Trigonometry Examples

$\frac{x^{2}}{49} + \frac{y^{2}}{25} = 1$ , $\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1

Solve for $x$ in $\frac{x^{2}}{49} + \frac{y^{2}}{25} = 1$ .

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Step 1.1

Subtract $\frac{y^{2}}{25}$ from both sides of the equation.

$\frac{x^{2}}{49} = 1 - \frac{y^{2}}{25}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.2

Multiply both sides of the equation by $49$ .

$49 (\frac{x^{2}}{49}) = 49 (1 - \frac{y^{2}}{25})$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.3

Simplify both sides of the equation.

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Step 1.3.1

Simplify the left side.

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Step 1.3.1.1

Cancel the common factor of $49$ .

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Step 1.3.1.1.1

Cancel the common factor.

$49 (\frac{x^{2}}{49}) = 49 (1 - \frac{y^{2}}{25})$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.3.1.1.2

Rewrite the expression.

$x^{2} = 49 (1 - \frac{y^{2}}{25})$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x^{2} = 49 (1 - \frac{y^{2}}{25})$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x^{2} = 49 (1 - \frac{y^{2}}{25})$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.3.2

Simplify the right side.

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Step 1.3.2.1

Simplify $49 (1 - \frac{y^{2}}{25})$ .

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Step 1.3.2.1.1

Apply the distributive property.

$x^{2} = 49 \cdot 1 + 49 (- \frac{y^{2}}{25})$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.3.2.1.2

Multiply $49$ by $1$ .

$x^{2} = 49 + 49 (- \frac{y^{2}}{25})$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.3.2.1.3

Multiply $49 (- \frac{y^{2}}{25})$ .

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Step 1.3.2.1.3.1

Multiply $- 1$ by $49$ .

$x^{2} = 49 - 49 \frac{y^{2}}{25}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.3.2.1.3.2

Combine $- 49$ and $\frac{y^{2}}{25}$ .

$x^{2} = 49 + \frac{- 49 y^{2}}{25}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x^{2} = 49 + \frac{- 49 y^{2}}{25}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.3.2.1.4

Move the negative in front of the fraction.

$x^{2} = 49 - \frac{49 y^{2}}{25}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x^{2} = 49 - \frac{49 y^{2}}{25}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x^{2} = 49 - \frac{49 y^{2}}{25}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x^{2} = 49 - \frac{49 y^{2}}{25}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.4

Take the specified root of both sides of the equation to eliminate the exponent on the left side.

$x = \pm \sqrt{49 - \frac{49 y^{2}}{25}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5

Simplify $\pm \sqrt{49 - \frac{49 y^{2}}{25}}$ .

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Step 1.5.1

Write the expression using exponents.

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Step 1.5.1.1

Rewrite $49$ as $7^{2}$ .

$x = \pm \sqrt{7^{2} - \frac{49 y^{2}}{25}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.1.2

Rewrite $\frac{49 y^{2}}{25}$ as ${(\frac{7 y}{5})}^{2}$ .

$x = \pm \sqrt{7^{2} - {(\frac{7 y}{5})}^{2}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = \pm \sqrt{7^{2} - {(\frac{7 y}{5})}^{2}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.2

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 7$ and $b = \frac{7 y}{5}$ .

$x = \pm \sqrt{(7 + \frac{7 y}{5}) (7 - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.3

To write $7$ as a fraction with a common denominator, multiply by $\frac{5}{5}$ .

$x = \pm \sqrt{(7 \cdot \frac{5}{5} + \frac{7 y}{5}) (7 - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.4

Combine $7$ and $\frac{5}{5}$ .

$x = \pm \sqrt{(\frac{7 \cdot 5}{5} + \frac{7 y}{5}) (7 - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.5

Combine the numerators over the common denominator.

$x = \pm \sqrt{\frac{7 \cdot 5 + 7 y}{5} \cdot (7 - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.6

Factor $7$ out of $7 \cdot 5 + 7 y$ .

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Step 1.5.6.1

Factor $7$ out of $7 \cdot 5$ .

$x = \pm \sqrt{\frac{7 (5) + 7 y}{5} \cdot (7 - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.6.2

Factor $7$ out of $7 y$ .

$x = \pm \sqrt{\frac{7 (5) + 7 (y)}{5} \cdot (7 - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.6.3

Factor $7$ out of $7 (5) + 7 (y)$ .

$x = \pm \sqrt{\frac{7 (5 + y)}{5} \cdot (7 - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = \pm \sqrt{\frac{7 (5 + y)}{5} \cdot (7 - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.7

To write $7$ as a fraction with a common denominator, multiply by $\frac{5}{5}$ .

$x = \pm \sqrt{\frac{7 (5 + y)}{5} \cdot (7 \cdot \frac{5}{5} - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.8

Combine $7$ and $\frac{5}{5}$ .

$x = \pm \sqrt{\frac{7 (5 + y)}{5} \cdot (\frac{7 \cdot 5}{5} - \frac{7 y}{5})}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.9

Combine the numerators over the common denominator.

$x = \pm \sqrt{\frac{7 (5 + y)}{5} \cdot \frac{7 \cdot 5 - 7 y}{5}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.10

Factor $7$ out of $7 \cdot 5 - 7 y$ .

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Step 1.5.10.1

Factor $7$ out of $7 \cdot 5$ .

$x = \pm \sqrt{\frac{7 (5 + y)}{5} \cdot \frac{7 (5) - 7 y}{5}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.10.2

Factor $7$ out of $- 7 y$ .

$x = \pm \sqrt{\frac{7 (5 + y)}{5} \cdot \frac{7 (5) + 7 (- y)}{5}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.10.3

Factor $7$ out of $7 (5) + 7 (- y)$ .

$x = \pm \sqrt{\frac{7 (5 + y)}{5} \cdot \frac{7 (5 - y)}{5}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = \pm \sqrt{\frac{7 (5 + y)}{5} \cdot \frac{7 (5 - y)}{5}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.11

Multiply $\frac{7 (5 + y)}{5}$ by $\frac{7 (5 - y)}{5}$ .

$x = \pm \sqrt{\frac{7 (5 + y) (7 (5 - y))}{5 \cdot 5}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.12

Multiply.

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Step 1.5.12.1

Multiply $7$ by $7$ .

$x = \pm \sqrt{\frac{49 (5 + y) (5 - y)}{5 \cdot 5}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.12.2

Multiply $5$ by $5$ .

$x = \pm \sqrt{\frac{49 (5 + y) (5 - y)}{25}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = \pm \sqrt{\frac{49 (5 + y) (5 - y)}{25}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.13

Rewrite $\frac{49 (5 + y) (5 - y)}{25}$ as ${(\frac{7}{5})}^{2} ((5 + y) (5 - y))$ .

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Step 1.5.13.1

Factor the perfect power $7^{2}$ out of $49 (5 + y) (5 - y)$ .

$x = \pm \sqrt{\frac{7^{2} ((5 + y) (5 - y))}{25}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.13.2

Factor the perfect power $5^{2}$ out of $25$ .

$x = \pm \sqrt{\frac{7^{2} ((5 + y) (5 - y))}{5^{2} \cdot 1}}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.13.3

Rearrange the fraction $\frac{7^{2} ((5 + y) (5 - y))}{5^{2} \cdot 1}$ .

$x = \pm \sqrt{{(\frac{7}{5})}^{2} ((5 + y) (5 - y))}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = \pm \sqrt{{(\frac{7}{5})}^{2} ((5 + y) (5 - y))}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.14

Pull terms out from under the radical.

$x = \pm \frac{7}{5} \cdot \sqrt{(5 + y) (5 - y)}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.5.15

Combine $\frac{7}{5}$ and $\sqrt{(5 + y) (5 - y)}$ .

$x = \pm \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = \pm \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.6

The complete solution is the result of both the positive and negative portions of the solution.

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Step 1.6.1

First, use the positive value of the $\pm$ to find the first solution.

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.6.2

Next, use the negative value of the $\pm$ to find the second solution.

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 1.6.3

The complete solution is the result of both the positive and negative portions of the solution.

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$

Step 2

Solve the system $x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}, \frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$ .

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Step 2.1

Replace all occurrences of $x$ with $\frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ in each equation.

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Step 2.1.1

Replace all occurrences of $x$ in $\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$ with $\frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ .

$\frac{{(\frac{7 \sqrt{(5 + y) (5 - y)}}{5})}^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2

Simplify the left side.

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Step 2.1.2.1

Simplify $\frac{{(\frac{7 \sqrt{(5 + y) (5 - y)}}{5})}^{2}}{25} + \frac{y^{2}}{49}$ .

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Step 2.1.2.1.1

Simplify each term.

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Step 2.1.2.1.1.1

Simplify the numerator.

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Step 2.1.2.1.1.1.1

Apply the product rule to $\frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ .

$\frac{\frac{{(7 \sqrt{(5 + y) (5 - y)})}^{2}}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2

Simplify the numerator.

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Step 2.1.2.1.1.1.2.1

Apply the product rule to $7 \sqrt{(5 + y) (5 - y)}$ .

$\frac{\frac{7^{2} {\sqrt{(5 + y) (5 - y)}}^{2}}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.2

Raise $7$ to the power of $2$ .

$\frac{\frac{49 {\sqrt{(5 + y) (5 - y)}}^{2}}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.3

Rewrite ${\sqrt{(5 + y) (5 - y)}}^{2}$ as $(5 + y) (5 - y)$ .

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Step 2.1.2.1.1.1.2.3.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{(5 + y) (5 - y)}$ as ${((5 + y) (5 - y))}^{\frac{1}{2}}$ .

$\frac{\frac{49 {({((5 + y) (5 - y))}^{\frac{1}{2}})}^{2}}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.3.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{\frac{49 {((5 + y) (5 - y))}^{\frac{1}{2} \cdot 2}}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.3.3

Combine $\frac{1}{2}$ and $2$ .

$\frac{\frac{49 {((5 + y) (5 - y))}^{\frac{2}{2}}}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.3.4

Cancel the common factor of $2$ .

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Step 2.1.2.1.1.1.2.3.4.1

Cancel the common factor.

$\frac{\frac{49 {((5 + y) (5 - y))}^{\frac{2}{2}}}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.3.4.2

Rewrite the expression.

$\frac{\frac{49 ((5 + y) (5 - y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{\frac{49 ((5 + y) (5 - y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.3.5

Simplify.

$\frac{\frac{49 ((5 + y) (5 - y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{\frac{49 ((5 + y) (5 - y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.4

Expand $(5 + y) (5 - y)$ using the FOIL Method.

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Step 2.1.2.1.1.1.2.4.1

Apply the distributive property.

$\frac{\frac{49 (5 (5 - y) + y (5 - y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.4.2

Apply the distributive property.

$\frac{\frac{49 (5 \cdot 5 + 5 (- y) + y (5 - y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.4.3

Apply the distributive property.

$\frac{\frac{49 (5 \cdot 5 + 5 (- y) + y \cdot 5 + y (- y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{\frac{49 (5 \cdot 5 + 5 (- y) + y \cdot 5 + y (- y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.5

Simplify and combine like terms.

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Step 2.1.2.1.1.1.2.5.1

Simplify each term.

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Step 2.1.2.1.1.1.2.5.1.1

Multiply $5$ by $5$ .

$\frac{\frac{49 (25 + 5 (- y) + y \cdot 5 + y (- y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.5.1.2

Multiply $- 1$ by $5$ .

$\frac{\frac{49 (25 - 5 y + y \cdot 5 + y (- y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.5.1.3

Move $5$ to the left of $y$ .

$\frac{\frac{49 (25 - 5 y + 5 \cdot y + y (- y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.5.1.4

Rewrite using the commutative property of multiplication.

$\frac{\frac{49 (25 - 5 y + 5 y - y \cdot y)}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.5.1.5

Multiply $y$ by $y$ by adding the exponents.

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Step 2.1.2.1.1.1.2.5.1.5.1

Move $y$ .

$\frac{\frac{49 (25 - 5 y + 5 y - (y \cdot y))}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.5.1.5.2

Multiply $y$ by $y$ .

$\frac{\frac{49 (25 - 5 y + 5 y - y^{2})}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{\frac{49 (25 - 5 y + 5 y - y^{2})}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{\frac{49 (25 - 5 y + 5 y - y^{2})}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.5.2

Add $- 5 y$ and $5 y$ .

$\frac{\frac{49 (25 + 0 - y^{2})}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.5.3

Add $25$ and $0$ .

$\frac{\frac{49 (25 - y^{2})}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{\frac{49 (25 - y^{2})}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.6

Rewrite $25$ as $5^{2}$ .

$\frac{\frac{49 (5^{2} - y^{2})}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.2.7

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 5$ and $b = y$ .

$\frac{\frac{49 (5 + y) (5 - y)}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{\frac{49 (5 + y) (5 - y)}{5^{2}}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.1.3

Raise $5$ to the power of $2$ .

$\frac{\frac{49 (5 + y) (5 - y)}{25}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{\frac{49 (5 + y) (5 - y)}{25}}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.2

Multiply the numerator by the reciprocal of the denominator.

$\frac{49 (5 + y) (5 - y)}{25} \cdot \frac{1}{25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.3

Multiply $\frac{49 (5 + y) (5 - y)}{25} \cdot \frac{1}{25}$ .

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Step 2.1.2.1.1.3.1

Multiply $\frac{49 (5 + y) (5 - y)}{25}$ by $\frac{1}{25}$ .

$\frac{49 (5 + y) (5 - y)}{25 \cdot 25} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.1.3.2

Multiply $25$ by $25$ .

$\frac{49 (5 + y) (5 - y)}{625} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{49 (5 + y) (5 - y)}{625} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{49 (5 + y) (5 - y)}{625} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.2

To write $\frac{49 (5 + y) (5 - y)}{625}$ as a fraction with a common denominator, multiply by $\frac{49}{49}$ .

$\frac{49 (5 + y) (5 - y)}{625} \cdot \frac{49}{49} + \frac{y^{2}}{49} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.3

To write $\frac{y^{2}}{49}$ as a fraction with a common denominator, multiply by $\frac{625}{625}$ .

$\frac{49 (5 + y) (5 - y)}{625} \cdot \frac{49}{49} + \frac{y^{2}}{49} \cdot \frac{625}{625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.4

Write each expression with a common denominator of $30625$ , by multiplying each by an appropriate factor of $1$ .

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Step 2.1.2.1.4.1

Multiply $\frac{49 (5 + y) (5 - y)}{625}$ by $\frac{49}{49}$ .

$\frac{49 (5 + y) (5 - y) \cdot 49}{625 \cdot 49} + \frac{y^{2}}{49} \cdot \frac{625}{625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.4.2

Multiply $625$ by $49$ .

$\frac{49 (5 + y) (5 - y) \cdot 49}{30625} + \frac{y^{2}}{49} \cdot \frac{625}{625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.4.3

Multiply $\frac{y^{2}}{49}$ by $\frac{625}{625}$ .

$\frac{49 (5 + y) (5 - y) \cdot 49}{30625} + \frac{y^{2} \cdot 625}{49 \cdot 625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.4.4

Multiply $49$ by $625$ .

$\frac{49 (5 + y) (5 - y) \cdot 49}{30625} + \frac{y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{49 (5 + y) (5 - y) \cdot 49}{30625} + \frac{y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.5

Combine the numerators over the common denominator.

$\frac{49 (5 + y) (5 - y) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6

Simplify the numerator.

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Step 2.1.2.1.6.1

Apply the distributive property.

$\frac{(49 \cdot 5 + 49 y) (5 - y) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.2

Multiply $49$ by $5$ .

$\frac{(245 + 49 y) (5 - y) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.3

Expand $(245 + 49 y) (5 - y)$ using the FOIL Method.

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Step 2.1.2.1.6.3.1

Apply the distributive property.

$\frac{(245 (5 - y) + 49 y (5 - y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.3.2

Apply the distributive property.

$\frac{(245 \cdot 5 + 245 (- y) + 49 y (5 - y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.3.3

Apply the distributive property.

$\frac{(245 \cdot 5 + 245 (- y) + 49 y \cdot 5 + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{(245 \cdot 5 + 245 (- y) + 49 y \cdot 5 + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.4

Simplify and combine like terms.

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Step 2.1.2.1.6.4.1

Simplify each term.

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Step 2.1.2.1.6.4.1.1

Multiply $245$ by $5$ .

$\frac{(1225 + 245 (- y) + 49 y \cdot 5 + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.4.1.2

Multiply $- 1$ by $245$ .

$\frac{(1225 - 245 y + 49 y \cdot 5 + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.4.1.3

Multiply $5$ by $49$ .

$\frac{(1225 - 245 y + 245 y + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.4.1.4

Rewrite using the commutative property of multiplication.

$\frac{(1225 - 245 y + 245 y + 49 \cdot (- 1 y \cdot y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.4.1.5

Multiply $y$ by $y$ by adding the exponents.

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Step 2.1.2.1.6.4.1.5.1

Move $y$ .

$\frac{(1225 - 245 y + 245 y + 49 \cdot (- 1 (y \cdot y))) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.4.1.5.2

Multiply $y$ by $y$ .

$\frac{(1225 - 245 y + 245 y + 49 \cdot (- 1 y^{2})) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{(1225 - 245 y + 245 y + 49 \cdot (- 1 y^{2})) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.4.1.6

Multiply $49$ by $- 1$ .

$\frac{(1225 - 245 y + 245 y - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{(1225 - 245 y + 245 y - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.4.2

Add $- 245 y$ and $245 y$ .

$\frac{(1225 + 0 - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.4.3

Add $1225$ and $0$ .

$\frac{(1225 - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{(1225 - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.5

Apply the distributive property.

$\frac{1225 \cdot 49 - 49 y^{2} \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.6

Multiply $1225$ by $49$ .

$\frac{60025 - 49 y^{2} \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.7

Multiply $49$ by $- 49$ .

$\frac{60025 - 2401 y^{2} + y^{2} \cdot 625}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.8

Move $625$ to the left of $y^{2}$ .

$\frac{60025 - 2401 y^{2} + 625 \cdot y^{2}}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.1.2.1.6.9

Add $- 2401 y^{2}$ and $625 y^{2}$ .

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2

Solve for $y$ in $\frac{60025 - 1776 y^{2}}{30625} = 1$ .

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Step 2.2.1

Multiply both sides by $30625$ .

$\frac{60025 - 1776 y^{2}}{30625} \cdot 30625 = 1 \cdot 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.2

Simplify.

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Step 2.2.2.1

Simplify the left side.

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Step 2.2.2.1.1

Simplify $\frac{60025 - 1776 y^{2}}{30625} \cdot 30625$ .

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Step 2.2.2.1.1.1

Cancel the common factor of $30625$ .

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Step 2.2.2.1.1.1.1

Cancel the common factor.

$\frac{60025 - 1776 y^{2}}{30625} \cdot 30625 = 1 \cdot 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.2.1.1.1.2

Rewrite the expression.

$60025 - 1776 y^{2} = 1 \cdot 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$60025 - 1776 y^{2} = 1 \cdot 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.2.1.1.2

Reorder $60025$ and $- 1776 y^{2}$ .

$- 1776 y^{2} + 60025 = 1 \cdot 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} + 60025 = 1 \cdot 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} + 60025 = 1 \cdot 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.2.2

Simplify the right side.

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Step 2.2.2.2.1

Multiply $30625$ by $1$ .

$- 1776 y^{2} + 60025 = 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} + 60025 = 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} + 60025 = 30625$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3

Solve for $y$ .

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Step 2.2.3.1

Move all terms not containing $y$ to the right side of the equation.

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Step 2.2.3.1.1

Subtract $60025$ from both sides of the equation.

$- 1776 y^{2} = 30625 - 60025$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.1.2

Subtract $60025$ from $30625$ .

$- 1776 y^{2} = - 29400$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} = - 29400$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.2

Divide each term in $- 1776 y^{2} = - 29400$ by $- 1776$ and simplify.

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Step 2.2.3.2.1

Divide each term in $- 1776 y^{2} = - 29400$ by $- 1776$ .

$\frac{- 1776 y^{2}}{- 1776} = \frac{- 29400}{- 1776}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.2.2

Simplify the left side.

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Step 2.2.3.2.2.1

Cancel the common factor of $- 1776$ .

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Step 2.2.3.2.2.1.1

Cancel the common factor.

$\frac{- 1776 y^{2}}{- 1776} = \frac{- 29400}{- 1776}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.2.2.1.2

Divide $y^{2}$ by $1$ .

$y^{2} = \frac{- 29400}{- 1776}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{- 29400}{- 1776}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{- 29400}{- 1776}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.2.3

Simplify the right side.

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Step 2.2.3.2.3.1

Cancel the common factor of $- 29400$ and $- 1776$ .

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Step 2.2.3.2.3.1.1

Factor $- 24$ out of $- 29400$ .

$y^{2} = \frac{- 24 \cdot 1225}{- 1776}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.2.3.1.2

Cancel the common factors.

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Step 2.2.3.2.3.1.2.1

Factor $- 24$ out of $- 1776$ .

$y^{2} = \frac{- 24 \cdot 1225}{- 24 \cdot 74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.2.3.1.2.2

Cancel the common factor.

$y^{2} = \frac{- 24 \cdot 1225}{- 24 \cdot 74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.2.3.1.2.3

Rewrite the expression.

$y^{2} = \frac{1225}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{1225}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{1225}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{1225}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{1225}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.3

Take the specified root of both sides of the equation to eliminate the exponent on the left side.

$y = \pm \sqrt{\frac{1225}{74}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4

Simplify $\pm \sqrt{\frac{1225}{74}}$ .

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Step 2.2.3.4.1

Rewrite $\sqrt{\frac{1225}{74}}$ as $\frac{\sqrt{1225}}{\sqrt{74}}$ .

$y = \pm \frac{\sqrt{1225}}{\sqrt{74}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.2

Simplify the numerator.

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Step 2.2.3.4.2.1

Rewrite $1225$ as $35^{2}$ .

$y = \pm \frac{\sqrt{35^{2}}}{\sqrt{74}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.2.2

Pull terms out from under the radical, assuming positive real numbers.

$y = \pm \frac{35}{\sqrt{74}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35}{\sqrt{74}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.3

Multiply $\frac{35}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$y = \pm \frac{35}{\sqrt{74}} \cdot \frac{\sqrt{74}}{\sqrt{74}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4

Combine and simplify the denominator.

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Step 2.2.3.4.4.1

Multiply $\frac{35}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$y = \pm \frac{35 \sqrt{74}}{\sqrt{74} \sqrt{74}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.2

Raise $\sqrt{74}$ to the power of $1$ .

$y = \pm \frac{35 \sqrt{74}}{\sqrt{74} \sqrt{74}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.3

Raise $\sqrt{74}$ to the power of $1$ .

$y = \pm \frac{35 \sqrt{74}}{\sqrt{74} \sqrt{74}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \pm \frac{35 \sqrt{74}}{{\sqrt{74}}^{1 + 1}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.5

Add $1$ and $1$ .

$y = \pm \frac{35 \sqrt{74}}{{\sqrt{74}}^{2}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.6

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 2.2.3.4.4.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$y = \pm \frac{35 \sqrt{74}}{{(74^{\frac{1}{2}})}^{2}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$y = \pm \frac{35 \sqrt{74}}{74^{\frac{1}{2} \cdot 2}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.6.3

Combine $\frac{1}{2}$ and $2$ .

$y = \pm \frac{35 \sqrt{74}}{74^{\frac{2}{2}}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.6.4

Cancel the common factor of $2$ .

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Step 2.2.3.4.4.6.4.1

Cancel the common factor.

$y = \pm \frac{35 \sqrt{74}}{74^{\frac{2}{2}}}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.6.4.2

Rewrite the expression.

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.4.4.6.5

Evaluate the exponent.

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.5

The complete solution is the result of both the positive and negative portions of the solution.

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Step 2.2.3.5.1

First, use the positive value of the $\pm$ to find the first solution.

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.5.2

Next, use the negative value of the $\pm$ to find the second solution.

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.2.3.5.3

The complete solution is the result of both the positive and negative portions of the solution.

$y = \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 2.3

Replace all occurrences of $y$ with $\frac{35 \sqrt{74}}{74}$ in each equation.

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Step 2.3.1

Replace all occurrences of $y$ in $x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ with $\frac{35 \sqrt{74}}{74}$ .

$x = \frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2

Simplify $x = \frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$ .

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Step 2.3.2.1

Simplify the left side.

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Step 2.3.2.1.1

Remove parentheses.

$x = \frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2

Simplify the right side.

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Step 2.3.2.2.1

Simplify $\frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$ .

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Step 2.3.2.2.1.1

Simplify the numerator.

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Step 2.3.2.2.1.1.1

To write $5$ as a fraction with a common denominator, multiply by $\frac{74}{74}$ .

$x = \frac{7 \sqrt{(5 \cdot \frac{74}{74} + \frac{35 \sqrt{74}}{74}) (5 - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.2

Combine $5$ and $\frac{74}{74}$ .

$x = \frac{7 \sqrt{(\frac{5 \cdot 74}{74} + \frac{35 \sqrt{74}}{74}) (5 - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.3

Combine the numerators over the common denominator.

$x = \frac{7 \sqrt{\frac{5 \cdot 74 + 35 \sqrt{74}}{74} \cdot (5 - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.4

Multiply $5$ by $74$ .

$x = \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot (5 - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.5

To write $5$ as a fraction with a common denominator, multiply by $\frac{74}{74}$ .

$x = \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot (5 \cdot \frac{74}{74} - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.6

Combine $5$ and $\frac{74}{74}$ .

$x = \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot (\frac{5 \cdot 74}{74} - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.7

Combine the numerators over the common denominator.

$x = \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot \frac{5 \cdot 74 - 35 \sqrt{74}}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.8

Multiply $5$ by $74$ .

$x = \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot \frac{370 - 35 \sqrt{74}}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.9

Multiply $\frac{370 + 35 \sqrt{74}}{74}$ by $\frac{370 - 35 \sqrt{74}}{74}$ .

$x = \frac{7 \sqrt{\frac{(370 + 35 \sqrt{74}) (370 - 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10

Simplify the numerator.

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Step 2.3.2.2.1.1.10.1

Expand $(370 + 35 \sqrt{74}) (370 - 35 \sqrt{74})$ using the FOIL Method.

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Step 2.3.2.2.1.1.10.1.1

Apply the distributive property.

$x = \frac{7 \sqrt{\frac{370 (370 - 35 \sqrt{74}) + 35 \sqrt{74} (370 - 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.1.2

Apply the distributive property.

$x = \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (- 35 \sqrt{74}) + 35 \sqrt{74} (370 - 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.1.3

Apply the distributive property.

$x = \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (- 35 \sqrt{74}) + 35 \sqrt{74} \cdot 370 + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (- 35 \sqrt{74}) + 35 \sqrt{74} \cdot 370 + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2

Simplify and combine like terms.

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Step 2.3.2.2.1.1.10.2.1

Simplify each term.

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Step 2.3.2.2.1.1.10.2.1.1

Multiply $370$ by $370$ .

$x = \frac{7 \sqrt{\frac{136900 + 370 (- 35 \sqrt{74}) + 35 \sqrt{74} \cdot 370 + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.2

Multiply $- 35$ by $370$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 35 \sqrt{74} \cdot 370 + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.3

Multiply $370$ by $35$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.4

Multiply $35 \sqrt{74} (- 35 \sqrt{74})$ .

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Step 2.3.2.2.1.1.10.2.1.4.1

Multiply $- 35$ by $35$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \sqrt{74} \sqrt{74}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.4.2

Raise $\sqrt{74}$ to the power of $1$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 (\sqrt{74} \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.4.3

Raise $\sqrt{74}$ to the power of $1$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 (\sqrt{74} \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.4.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 {\sqrt{74}}^{1 + 1}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.4.5

Add $1$ and $1$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 {\sqrt{74}}^{2}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 {\sqrt{74}}^{2}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.5

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 2.3.2.2.1.1.10.2.1.5.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 {(74^{\frac{1}{2}})}^{2}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.5.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74^{\frac{1}{2} \cdot 2}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.5.3

Combine $\frac{1}{2}$ and $2$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74^{\frac{2}{2}}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.5.4

Cancel the common factor of $2$ .

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Step 2.3.2.2.1.1.10.2.1.5.4.1

Cancel the common factor.

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74^{\frac{2}{2}}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.5.4.2

Rewrite the expression.

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.5.5

Evaluate the exponent.

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.1.6

Multiply $- 1225$ by $74$ .

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 90650}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 90650}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.2

Subtract $90650$ from $136900$ .

$x = \frac{7 \sqrt{\frac{46250 - 12950 \sqrt{74} + 12950 \sqrt{74}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.3

Add $- 12950 \sqrt{74}$ and $12950 \sqrt{74}$ .

$x = \frac{7 \sqrt{\frac{46250 + 0}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.10.2.4

Add $46250$ and $0$ .

$x = \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.11

Multiply $74$ by $74$ .

$x = \frac{7 \sqrt{\frac{46250}{5476}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.12

Cancel the common factor of $46250$ and $5476$ .

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Step 2.3.2.2.1.1.12.1

Factor $74$ out of $46250$ .

$x = \frac{7 \sqrt{\frac{74 (625)}{5476}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.12.2

Cancel the common factors.

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Step 2.3.2.2.1.1.12.2.1

Factor $74$ out of $5476$ .

$x = \frac{7 \sqrt{\frac{74 \cdot 625}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.12.2.2

Cancel the common factor.

$x = \frac{7 \sqrt{\frac{74 \cdot 625}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.12.2.3

Rewrite the expression.

$x = \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.13

Rewrite $\sqrt{\frac{625}{74}}$ as $\frac{\sqrt{625}}{\sqrt{74}}$ .

$x = \frac{7 (\frac{\sqrt{625}}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.14

Simplify the numerator.

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Step 2.3.2.2.1.1.14.1

Rewrite $625$ as $25^{2}$ .

$x = \frac{7 (\frac{\sqrt{25^{2}}}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.14.2

Pull terms out from under the radical, assuming positive real numbers.

$x = \frac{7 (\frac{25}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.15

Multiply $\frac{25}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$x = \frac{7 (\frac{25}{\sqrt{74}} \cdot \frac{\sqrt{74}}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16

Combine and simplify the denominator.

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Step 2.3.2.2.1.1.16.1

Multiply $\frac{25}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.2

Raise $\sqrt{74}$ to the power of $1$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.3

Raise $\sqrt{74}$ to the power of $1$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$x = \frac{7 (\frac{25 \sqrt{74}}{{\sqrt{74}}^{1 + 1}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.5

Add $1$ and $1$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{{\sqrt{74}}^{2}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.6

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 2.3.2.2.1.1.16.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{{(74^{\frac{1}{2}})}^{2}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{1}{2} \cdot 2}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.6.3

Combine $\frac{1}{2}$ and $2$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{2}{2}}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.6.4

Cancel the common factor of $2$ .

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Step 2.3.2.2.1.1.16.6.4.1

Cancel the common factor.

$x = \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{2}{2}}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.6.4.2

Rewrite the expression.

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.1.16.6.5

Evaluate the exponent.

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.2

Combine $7$ and $\frac{25 \sqrt{74}}{74}$ .

$x = \frac{\frac{7 (25 \sqrt{74})}{74}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.3

Multiply $7$ by $25$ .

$x = \frac{\frac{175 \sqrt{74}}{74}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.4

Multiply the numerator by the reciprocal of the denominator.

$x = \frac{175 \sqrt{74}}{74} \cdot \frac{1}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.5

Cancel the common factor of $5$ .

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Step 2.3.2.2.1.5.1

Factor $5$ out of $175 \sqrt{74}$ .

$x = \frac{5 (35 \sqrt{74})}{74} \cdot \frac{1}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.5.2

Cancel the common factor.

$x = \frac{5 (35 \sqrt{74})}{74} \cdot \frac{1}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.3.2.2.1.5.3

Rewrite the expression.

$x = \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

Step 2.4

Replace all occurrences of $y$ with $- \frac{35 \sqrt{74}}{74}$ in each equation.

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Step 2.4.1

Replace all occurrences of $y$ in $x = \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ with $- \frac{35 \sqrt{74}}{74}$ .

$x = \frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2

Simplify $x = \frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$ .

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Step 2.4.2.1

Simplify the left side.

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Step 2.4.2.1.1

Remove parentheses.

$x = \frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2

Simplify the right side.

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Step 2.4.2.2.1

Simplify $\frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$ .

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Step 2.4.2.2.1.1

Simplify the numerator.

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Step 2.4.2.2.1.1.1

To write $5$ as a fraction with a common denominator, multiply by $\frac{74}{74}$ .

$x = \frac{7 \sqrt{(5 \cdot \frac{74}{74} - \frac{35 \sqrt{74}}{74}) (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.2

Combine $5$ and $\frac{74}{74}$ .

$x = \frac{7 \sqrt{(\frac{5 \cdot 74}{74} - \frac{35 \sqrt{74}}{74}) (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.3

Combine the numerators over the common denominator.

$x = \frac{7 \sqrt{\frac{5 \cdot 74 - 35 \sqrt{74}}{74} \cdot (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.4

Multiply $5$ by $74$ .

$x = \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.5

Multiply $- - \frac{35 \sqrt{74}}{74}$ .

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Step 2.4.2.2.1.1.5.1

Multiply $- 1$ by $- 1$ .

$x = \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 + 1 (\frac{35 \sqrt{74}}{74}))}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.5.2

Multiply $\frac{35 \sqrt{74}}{74}$ by $1$ .

$x = \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.6

To write $5$ as a fraction with a common denominator, multiply by $\frac{74}{74}$ .

$x = \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 \cdot \frac{74}{74} + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.7

Combine $5$ and $\frac{74}{74}$ .

$x = \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (\frac{5 \cdot 74}{74} + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.8

Combine the numerators over the common denominator.

$x = \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot \frac{5 \cdot 74 + 35 \sqrt{74}}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.9

Multiply $5$ by $74$ .

$x = \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot \frac{370 + 35 \sqrt{74}}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.10

Multiply $\frac{370 - 35 \sqrt{74}}{74}$ by $\frac{370 + 35 \sqrt{74}}{74}$ .

$x = \frac{7 \sqrt{\frac{(370 - 35 \sqrt{74}) (370 + 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11

Simplify the numerator.

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Step 2.4.2.2.1.1.11.1

Expand $(370 - 35 \sqrt{74}) (370 + 35 \sqrt{74})$ using the FOIL Method.

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Step 2.4.2.2.1.1.11.1.1

Apply the distributive property.

$x = \frac{7 \sqrt{\frac{370 (370 + 35 \sqrt{74}) - 35 \sqrt{74} (370 + 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.1.2

Apply the distributive property.

$x = \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (35 \sqrt{74}) - 35 \sqrt{74} (370 + 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.1.3

Apply the distributive property.

$x = \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (35 \sqrt{74}) - 35 \sqrt{74} \cdot 370 - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (35 \sqrt{74}) - 35 \sqrt{74} \cdot 370 - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2

Simplify and combine like terms.

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Step 2.4.2.2.1.1.11.2.1

Simplify each term.

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Step 2.4.2.2.1.1.11.2.1.1

Multiply $370$ by $370$ .

$x = \frac{7 \sqrt{\frac{136900 + 370 (35 \sqrt{74}) - 35 \sqrt{74} \cdot 370 - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.2

Multiply $35$ by $370$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 35 \sqrt{74} \cdot 370 - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.3

Multiply $370$ by $- 35$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.4

Multiply $- 35 \sqrt{74} (35 \sqrt{74})$ .

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Step 2.4.2.2.1.1.11.2.1.4.1

Multiply $35$ by $- 35$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \sqrt{74} \sqrt{74}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.4.2

Raise $\sqrt{74}$ to the power of $1$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 (\sqrt{74} \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.4.3

Raise $\sqrt{74}$ to the power of $1$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 (\sqrt{74} \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.4.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 {\sqrt{74}}^{1 + 1}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.4.5

Add $1$ and $1$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 {\sqrt{74}}^{2}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 {\sqrt{74}}^{2}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.5

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 2.4.2.2.1.1.11.2.1.5.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 {(74^{\frac{1}{2}})}^{2}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.5.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74^{\frac{1}{2} \cdot 2}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.5.3

Combine $\frac{1}{2}$ and $2$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74^{\frac{2}{2}}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.5.4

Cancel the common factor of $2$ .

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Step 2.4.2.2.1.1.11.2.1.5.4.1

Cancel the common factor.

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74^{\frac{2}{2}}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.5.4.2

Rewrite the expression.

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.5.5

Evaluate the exponent.

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.1.6

Multiply $- 1225$ by $74$ .

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 90650}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 90650}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.2

Subtract $90650$ from $136900$ .

$x = \frac{7 \sqrt{\frac{46250 + 12950 \sqrt{74} - 12950 \sqrt{74}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.3

Subtract $12950 \sqrt{74}$ from $12950 \sqrt{74}$ .

$x = \frac{7 \sqrt{\frac{46250 + 0}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.11.2.4

Add $46250$ and $0$ .

$x = \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.12

Multiply $74$ by $74$ .

$x = \frac{7 \sqrt{\frac{46250}{5476}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.13

Cancel the common factor of $46250$ and $5476$ .

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Step 2.4.2.2.1.1.13.1

Factor $74$ out of $46250$ .

$x = \frac{7 \sqrt{\frac{74 (625)}{5476}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.13.2

Cancel the common factors.

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Step 2.4.2.2.1.1.13.2.1

Factor $74$ out of $5476$ .

$x = \frac{7 \sqrt{\frac{74 \cdot 625}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.13.2.2

Cancel the common factor.

$x = \frac{7 \sqrt{\frac{74 \cdot 625}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.13.2.3

Rewrite the expression.

$x = \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.14

Rewrite $\sqrt{\frac{625}{74}}$ as $\frac{\sqrt{625}}{\sqrt{74}}$ .

$x = \frac{7 (\frac{\sqrt{625}}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.15

Simplify the numerator.

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Step 2.4.2.2.1.1.15.1

Rewrite $625$ as $25^{2}$ .

$x = \frac{7 (\frac{\sqrt{25^{2}}}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.15.2

Pull terms out from under the radical, assuming positive real numbers.

$x = \frac{7 (\frac{25}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.16

Multiply $\frac{25}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$x = \frac{7 (\frac{25}{\sqrt{74}} \cdot \frac{\sqrt{74}}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17

Combine and simplify the denominator.

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Step 2.4.2.2.1.1.17.1

Multiply $\frac{25}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.2

Raise $\sqrt{74}$ to the power of $1$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.3

Raise $\sqrt{74}$ to the power of $1$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$x = \frac{7 (\frac{25 \sqrt{74}}{{\sqrt{74}}^{1 + 1}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.5

Add $1$ and $1$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{{\sqrt{74}}^{2}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.6

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 2.4.2.2.1.1.17.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{{(74^{\frac{1}{2}})}^{2}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{1}{2} \cdot 2}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.6.3

Combine $\frac{1}{2}$ and $2$ .

$x = \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{2}{2}}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.6.4

Cancel the common factor of $2$ .

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Step 2.4.2.2.1.1.17.6.4.1

Cancel the common factor.

$x = \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{2}{2}}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.6.4.2

Rewrite the expression.

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.1.17.6.5

Evaluate the exponent.

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.2

Combine $7$ and $\frac{25 \sqrt{74}}{74}$ .

$x = \frac{\frac{7 (25 \sqrt{74})}{74}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.3

Multiply $7$ by $25$ .

$x = \frac{\frac{175 \sqrt{74}}{74}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.4

Multiply the numerator by the reciprocal of the denominator.

$x = \frac{175 \sqrt{74}}{74} \cdot \frac{1}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.5

Cancel the common factor of $5$ .

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Step 2.4.2.2.1.5.1

Factor $5$ out of $175 \sqrt{74}$ .

$x = \frac{5 (35 \sqrt{74})}{74} \cdot \frac{1}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.5.2

Cancel the common factor.

$x = \frac{5 (35 \sqrt{74})}{74} \cdot \frac{1}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 2.4.2.2.1.5.3

Rewrite the expression.

$x = \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3

Solve the system $x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}, \frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$ .

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Step 3.1

Replace all occurrences of $x$ with $- \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ in each equation.

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Step 3.1.1

Replace all occurrences of $x$ in $\frac{x^{2}}{25} + \frac{y^{2}}{49} = 1$ with $- \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ .

$\frac{{(- \frac{7 \sqrt{(5 + y) (5 - y)}}{5})}^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2

Simplify the left side.

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Step 3.1.2.1

Simplify $\frac{{(- \frac{7 \sqrt{(5 + y) (5 - y)}}{5})}^{2}}{25} + \frac{y^{2}}{49}$ .

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Step 3.1.2.1.1

Simplify each term.

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Step 3.1.2.1.1.1

Simplify the numerator.

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Step 3.1.2.1.1.1.1

Apply the product rule to $- \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ .

$\frac{{(- 1)}^{2} {(\frac{7 \sqrt{(5 + y) (5 - y)}}{5})}^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.2

Raise $- 1$ to the power of $2$ .

$\frac{1 {(\frac{7 \sqrt{(5 + y) (5 - y)}}{5})}^{2}}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.3

Use the power rule ${(a b)}^{n} = a^{n} b^{n}$ to distribute the exponent.

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Step 3.1.2.1.1.1.3.1

Apply the product rule to $\frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ .

$\frac{1 (\frac{{(7 \sqrt{(5 + y) (5 - y)})}^{2}}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.3.2

Apply the product rule to $7 \sqrt{(5 + y) (5 - y)}$ .

$\frac{1 (\frac{7^{2} {\sqrt{(5 + y) (5 - y)}}^{2}}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{1 (\frac{7^{2} {\sqrt{(5 + y) (5 - y)}}^{2}}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4

Simplify the numerator.

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Step 3.1.2.1.1.1.4.1

Raise $7$ to the power of $2$ .

$\frac{1 (\frac{49 {\sqrt{(5 + y) (5 - y)}}^{2}}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.2

Rewrite ${\sqrt{(5 + y) (5 - y)}}^{2}$ as $(5 + y) (5 - y)$ .

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Step 3.1.2.1.1.1.4.2.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{(5 + y) (5 - y)}$ as ${((5 + y) (5 - y))}^{\frac{1}{2}}$ .

$\frac{1 (\frac{49 {({((5 + y) (5 - y))}^{\frac{1}{2}})}^{2}}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.2.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{1 (\frac{49 {((5 + y) (5 - y))}^{\frac{1}{2} \cdot 2}}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.2.3

Combine $\frac{1}{2}$ and $2$ .

$\frac{1 (\frac{49 {((5 + y) (5 - y))}^{\frac{2}{2}}}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.2.4

Cancel the common factor of $2$ .

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Step 3.1.2.1.1.1.4.2.4.1

Cancel the common factor.

$\frac{1 (\frac{49 {((5 + y) (5 - y))}^{\frac{2}{2}}}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.2.4.2

Rewrite the expression.

$\frac{1 (\frac{49 ((5 + y) (5 - y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{1 (\frac{49 ((5 + y) (5 - y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.2.5

Simplify.

$\frac{1 (\frac{49 ((5 + y) (5 - y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{1 (\frac{49 ((5 + y) (5 - y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.3

Expand $(5 + y) (5 - y)$ using the FOIL Method.

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Step 3.1.2.1.1.1.4.3.1

Apply the distributive property.

$\frac{1 (\frac{49 (5 (5 - y) + y (5 - y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.3.2

Apply the distributive property.

$\frac{1 (\frac{49 (5 \cdot 5 + 5 (- y) + y (5 - y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.3.3

Apply the distributive property.

$\frac{1 (\frac{49 (5 \cdot 5 + 5 (- y) + y \cdot 5 + y (- y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{1 (\frac{49 (5 \cdot 5 + 5 (- y) + y \cdot 5 + y (- y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.4

Simplify and combine like terms.

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Step 3.1.2.1.1.1.4.4.1

Simplify each term.

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Step 3.1.2.1.1.1.4.4.1.1

Multiply $5$ by $5$ .

$\frac{1 (\frac{49 (25 + 5 (- y) + y \cdot 5 + y (- y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.4.1.2

Multiply $- 1$ by $5$ .

$\frac{1 (\frac{49 (25 - 5 y + y \cdot 5 + y (- y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.4.1.3

Move $5$ to the left of $y$ .

$\frac{1 (\frac{49 (25 - 5 y + 5 \cdot y + y (- y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.4.1.4

Rewrite using the commutative property of multiplication.

$\frac{1 (\frac{49 (25 - 5 y + 5 y - y \cdot y)}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.4.1.5

Multiply $y$ by $y$ by adding the exponents.

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Step 3.1.2.1.1.1.4.4.1.5.1

Move $y$ .

$\frac{1 (\frac{49 (25 - 5 y + 5 y - (y \cdot y))}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.4.1.5.2

Multiply $y$ by $y$ .

$\frac{1 (\frac{49 (25 - 5 y + 5 y - y^{2})}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{1 (\frac{49 (25 - 5 y + 5 y - y^{2})}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{1 (\frac{49 (25 - 5 y + 5 y - y^{2})}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.4.2

Add $- 5 y$ and $5 y$ .

$\frac{1 (\frac{49 (25 + 0 - y^{2})}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.4.3

Add $25$ and $0$ .

$\frac{1 (\frac{49 (25 - y^{2})}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{1 (\frac{49 (25 - y^{2})}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.5

Rewrite $25$ as $5^{2}$ .

$\frac{1 (\frac{49 (5^{2} - y^{2})}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.4.6

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 5$ and $b = y$ .

$\frac{1 (\frac{49 (5 + y) (5 - y)}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{1 (\frac{49 (5 + y) (5 - y)}{5^{2}})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.5

Raise $5$ to the power of $2$ .

$\frac{1 (\frac{49 (5 + y) (5 - y)}{25})}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.1.6

Multiply $\frac{49 (5 + y) (5 - y)}{25}$ by $1$ .

$\frac{\frac{49 (5 + y) (5 - y)}{25}}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{\frac{49 (5 + y) (5 - y)}{25}}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.2

Multiply the numerator by the reciprocal of the denominator.

$\frac{49 (5 + y) (5 - y)}{25} \cdot \frac{1}{25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.3

Multiply $\frac{49 (5 + y) (5 - y)}{25} \cdot \frac{1}{25}$ .

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Step 3.1.2.1.1.3.1

Multiply $\frac{49 (5 + y) (5 - y)}{25}$ by $\frac{1}{25}$ .

$\frac{49 (5 + y) (5 - y)}{25 \cdot 25} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.1.3.2

Multiply $25$ by $25$ .

$\frac{49 (5 + y) (5 - y)}{625} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{49 (5 + y) (5 - y)}{625} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{49 (5 + y) (5 - y)}{625} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.2

To write $\frac{49 (5 + y) (5 - y)}{625}$ as a fraction with a common denominator, multiply by $\frac{49}{49}$ .

$\frac{49 (5 + y) (5 - y)}{625} \cdot \frac{49}{49} + \frac{y^{2}}{49} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.3

To write $\frac{y^{2}}{49}$ as a fraction with a common denominator, multiply by $\frac{625}{625}$ .

$\frac{49 (5 + y) (5 - y)}{625} \cdot \frac{49}{49} + \frac{y^{2}}{49} \cdot \frac{625}{625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.4

Write each expression with a common denominator of $30625$ , by multiplying each by an appropriate factor of $1$ .

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Step 3.1.2.1.4.1

Multiply $\frac{49 (5 + y) (5 - y)}{625}$ by $\frac{49}{49}$ .

$\frac{49 (5 + y) (5 - y) \cdot 49}{625 \cdot 49} + \frac{y^{2}}{49} \cdot \frac{625}{625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.4.2

Multiply $625$ by $49$ .

$\frac{49 (5 + y) (5 - y) \cdot 49}{30625} + \frac{y^{2}}{49} \cdot \frac{625}{625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.4.3

Multiply $\frac{y^{2}}{49}$ by $\frac{625}{625}$ .

$\frac{49 (5 + y) (5 - y) \cdot 49}{30625} + \frac{y^{2} \cdot 625}{49 \cdot 625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.4.4

Multiply $49$ by $625$ .

$\frac{49 (5 + y) (5 - y) \cdot 49}{30625} + \frac{y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{49 (5 + y) (5 - y) \cdot 49}{30625} + \frac{y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.5

Combine the numerators over the common denominator.

$\frac{49 (5 + y) (5 - y) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6

Simplify the numerator.

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Step 3.1.2.1.6.1

Apply the distributive property.

$\frac{(49 \cdot 5 + 49 y) (5 - y) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.2

Multiply $49$ by $5$ .

$\frac{(245 + 49 y) (5 - y) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.3

Expand $(245 + 49 y) (5 - y)$ using the FOIL Method.

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Step 3.1.2.1.6.3.1

Apply the distributive property.

$\frac{(245 (5 - y) + 49 y (5 - y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.3.2

Apply the distributive property.

$\frac{(245 \cdot 5 + 245 (- y) + 49 y (5 - y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.3.3

Apply the distributive property.

$\frac{(245 \cdot 5 + 245 (- y) + 49 y \cdot 5 + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{(245 \cdot 5 + 245 (- y) + 49 y \cdot 5 + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.4

Simplify and combine like terms.

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Step 3.1.2.1.6.4.1

Simplify each term.

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Step 3.1.2.1.6.4.1.1

Multiply $245$ by $5$ .

$\frac{(1225 + 245 (- y) + 49 y \cdot 5 + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.4.1.2

Multiply $- 1$ by $245$ .

$\frac{(1225 - 245 y + 49 y \cdot 5 + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.4.1.3

Multiply $5$ by $49$ .

$\frac{(1225 - 245 y + 245 y + 49 y (- y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.4.1.4

Rewrite using the commutative property of multiplication.

$\frac{(1225 - 245 y + 245 y + 49 \cdot (- 1 y \cdot y)) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.4.1.5

Multiply $y$ by $y$ by adding the exponents.

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Step 3.1.2.1.6.4.1.5.1

Move $y$ .

$\frac{(1225 - 245 y + 245 y + 49 \cdot (- 1 (y \cdot y))) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.4.1.5.2

Multiply $y$ by $y$ .

$\frac{(1225 - 245 y + 245 y + 49 \cdot (- 1 y^{2})) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{(1225 - 245 y + 245 y + 49 \cdot (- 1 y^{2})) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.4.1.6

Multiply $49$ by $- 1$ .

$\frac{(1225 - 245 y + 245 y - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{(1225 - 245 y + 245 y - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.4.2

Add $- 245 y$ and $245 y$ .

$\frac{(1225 + 0 - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.4.3

Add $1225$ and $0$ .

$\frac{(1225 - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{(1225 - 49 y^{2}) \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.5

Apply the distributive property.

$\frac{1225 \cdot 49 - 49 y^{2} \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.6

Multiply $1225$ by $49$ .

$\frac{60025 - 49 y^{2} \cdot 49 + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.7

Multiply $49$ by $- 49$ .

$\frac{60025 - 2401 y^{2} + y^{2} \cdot 625}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.8

Move $625$ to the left of $y^{2}$ .

$\frac{60025 - 2401 y^{2} + 625 \cdot y^{2}}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.1.2.1.6.9

Add $- 2401 y^{2}$ and $625 y^{2}$ .

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$\frac{60025 - 1776 y^{2}}{30625} = 1$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2

Solve for $y$ in $\frac{60025 - 1776 y^{2}}{30625} = 1$ .

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Step 3.2.1

Multiply both sides by $30625$ .

$\frac{60025 - 1776 y^{2}}{30625} \cdot 30625 = 1 \cdot 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.2

Simplify.

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Step 3.2.2.1

Simplify the left side.

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Step 3.2.2.1.1

Simplify $\frac{60025 - 1776 y^{2}}{30625} \cdot 30625$ .

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Step 3.2.2.1.1.1

Cancel the common factor of $30625$ .

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Step 3.2.2.1.1.1.1

Cancel the common factor.

$\frac{60025 - 1776 y^{2}}{30625} \cdot 30625 = 1 \cdot 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.2.1.1.1.2

Rewrite the expression.

$60025 - 1776 y^{2} = 1 \cdot 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$60025 - 1776 y^{2} = 1 \cdot 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.2.1.1.2

Reorder $60025$ and $- 1776 y^{2}$ .

$- 1776 y^{2} + 60025 = 1 \cdot 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} + 60025 = 1 \cdot 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} + 60025 = 1 \cdot 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.2.2

Simplify the right side.

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Step 3.2.2.2.1

Multiply $30625$ by $1$ .

$- 1776 y^{2} + 60025 = 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} + 60025 = 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} + 60025 = 30625$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3

Solve for $y$ .

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Step 3.2.3.1

Move all terms not containing $y$ to the right side of the equation.

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Step 3.2.3.1.1

Subtract $60025$ from both sides of the equation.

$- 1776 y^{2} = 30625 - 60025$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.1.2

Subtract $60025$ from $30625$ .

$- 1776 y^{2} = - 29400$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$- 1776 y^{2} = - 29400$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.2

Divide each term in $- 1776 y^{2} = - 29400$ by $- 1776$ and simplify.

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Step 3.2.3.2.1

Divide each term in $- 1776 y^{2} = - 29400$ by $- 1776$ .

$\frac{- 1776 y^{2}}{- 1776} = \frac{- 29400}{- 1776}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.2.2

Simplify the left side.

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Step 3.2.3.2.2.1

Cancel the common factor of $- 1776$ .

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Step 3.2.3.2.2.1.1

Cancel the common factor.

$\frac{- 1776 y^{2}}{- 1776} = \frac{- 29400}{- 1776}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.2.2.1.2

Divide $y^{2}$ by $1$ .

$y^{2} = \frac{- 29400}{- 1776}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{- 29400}{- 1776}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{- 29400}{- 1776}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.2.3

Simplify the right side.

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Step 3.2.3.2.3.1

Cancel the common factor of $- 29400$ and $- 1776$ .

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Step 3.2.3.2.3.1.1

Factor $- 24$ out of $- 29400$ .

$y^{2} = \frac{- 24 \cdot 1225}{- 1776}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.2.3.1.2

Cancel the common factors.

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Step 3.2.3.2.3.1.2.1

Factor $- 24$ out of $- 1776$ .

$y^{2} = \frac{- 24 \cdot 1225}{- 24 \cdot 74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.2.3.1.2.2

Cancel the common factor.

$y^{2} = \frac{- 24 \cdot 1225}{- 24 \cdot 74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.2.3.1.2.3

Rewrite the expression.

$y^{2} = \frac{1225}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{1225}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{1225}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{1225}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y^{2} = \frac{1225}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.3

Take the specified root of both sides of the equation to eliminate the exponent on the left side.

$y = \pm \sqrt{\frac{1225}{74}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4

Simplify $\pm \sqrt{\frac{1225}{74}}$ .

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Step 3.2.3.4.1

Rewrite $\sqrt{\frac{1225}{74}}$ as $\frac{\sqrt{1225}}{\sqrt{74}}$ .

$y = \pm \frac{\sqrt{1225}}{\sqrt{74}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.2

Simplify the numerator.

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Step 3.2.3.4.2.1

Rewrite $1225$ as $35^{2}$ .

$y = \pm \frac{\sqrt{35^{2}}}{\sqrt{74}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.2.2

Pull terms out from under the radical, assuming positive real numbers.

$y = \pm \frac{35}{\sqrt{74}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35}{\sqrt{74}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.3

Multiply $\frac{35}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$y = \pm \frac{35}{\sqrt{74}} \cdot \frac{\sqrt{74}}{\sqrt{74}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4

Combine and simplify the denominator.

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Step 3.2.3.4.4.1

Multiply $\frac{35}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$y = \pm \frac{35 \sqrt{74}}{\sqrt{74} \sqrt{74}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.2

Raise $\sqrt{74}$ to the power of $1$ .

$y = \pm \frac{35 \sqrt{74}}{\sqrt{74} \sqrt{74}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.3

Raise $\sqrt{74}$ to the power of $1$ .

$y = \pm \frac{35 \sqrt{74}}{\sqrt{74} \sqrt{74}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \pm \frac{35 \sqrt{74}}{{\sqrt{74}}^{1 + 1}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.5

Add $1$ and $1$ .

$y = \pm \frac{35 \sqrt{74}}{{\sqrt{74}}^{2}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.6

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 3.2.3.4.4.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$y = \pm \frac{35 \sqrt{74}}{{(74^{\frac{1}{2}})}^{2}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$y = \pm \frac{35 \sqrt{74}}{74^{\frac{1}{2} \cdot 2}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.6.3

Combine $\frac{1}{2}$ and $2$ .

$y = \pm \frac{35 \sqrt{74}}{74^{\frac{2}{2}}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.6.4

Cancel the common factor of $2$ .

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Step 3.2.3.4.4.6.4.1

Cancel the common factor.

$y = \pm \frac{35 \sqrt{74}}{74^{\frac{2}{2}}}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.6.4.2

Rewrite the expression.

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.4.4.6.5

Evaluate the exponent.

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \pm \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.5

The complete solution is the result of both the positive and negative portions of the solution.

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Step 3.2.3.5.1

First, use the positive value of the $\pm$ to find the first solution.

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.5.2

Next, use the negative value of the $\pm$ to find the second solution.

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.2.3.5.3

The complete solution is the result of both the positive and negative portions of the solution.

$y = \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

$y = \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$

Step 3.3

Replace all occurrences of $y$ with $\frac{35 \sqrt{74}}{74}$ in each equation.

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Step 3.3.1

Replace all occurrences of $y$ in $x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ with $\frac{35 \sqrt{74}}{74}$ .

$x = - \frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2

Simplify $x = - \frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$ .

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Step 3.3.2.1

Simplify the left side.

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Step 3.3.2.1.1

Remove parentheses.

$x = - \frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2

Simplify the right side.

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Step 3.3.2.2.1

Simplify $- \frac{7 \sqrt{(5 + \frac{35 \sqrt{74}}{74}) (5 - (\frac{35 \sqrt{74}}{74}))}}{5}$ .

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Step 3.3.2.2.1.1

Simplify the numerator.

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Step 3.3.2.2.1.1.1

To write $5$ as a fraction with a common denominator, multiply by $\frac{74}{74}$ .

$x = - \frac{7 \sqrt{(5 \cdot \frac{74}{74} + \frac{35 \sqrt{74}}{74}) (5 - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.2

Combine $5$ and $\frac{74}{74}$ .

$x = - \frac{7 \sqrt{(\frac{5 \cdot 74}{74} + \frac{35 \sqrt{74}}{74}) (5 - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.3

Combine the numerators over the common denominator.

$x = - \frac{7 \sqrt{\frac{5 \cdot 74 + 35 \sqrt{74}}{74} \cdot (5 - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.4

Multiply $5$ by $74$ .

$x = - \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot (5 - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.5

To write $5$ as a fraction with a common denominator, multiply by $\frac{74}{74}$ .

$x = - \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot (5 \cdot \frac{74}{74} - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.6

Combine $5$ and $\frac{74}{74}$ .

$x = - \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot (\frac{5 \cdot 74}{74} - \frac{35 \sqrt{74}}{74})}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.7

Combine the numerators over the common denominator.

$x = - \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot \frac{5 \cdot 74 - 35 \sqrt{74}}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.8

Multiply $5$ by $74$ .

$x = - \frac{7 \sqrt{\frac{370 + 35 \sqrt{74}}{74} \cdot \frac{370 - 35 \sqrt{74}}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.9

Multiply $\frac{370 + 35 \sqrt{74}}{74}$ by $\frac{370 - 35 \sqrt{74}}{74}$ .

$x = - \frac{7 \sqrt{\frac{(370 + 35 \sqrt{74}) (370 - 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10

Simplify the numerator.

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Step 3.3.2.2.1.1.10.1

Expand $(370 + 35 \sqrt{74}) (370 - 35 \sqrt{74})$ using the FOIL Method.

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Step 3.3.2.2.1.1.10.1.1

Apply the distributive property.

$x = - \frac{7 \sqrt{\frac{370 (370 - 35 \sqrt{74}) + 35 \sqrt{74} (370 - 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.1.2

Apply the distributive property.

$x = - \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (- 35 \sqrt{74}) + 35 \sqrt{74} (370 - 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.1.3

Apply the distributive property.

$x = - \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (- 35 \sqrt{74}) + 35 \sqrt{74} \cdot 370 + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (- 35 \sqrt{74}) + 35 \sqrt{74} \cdot 370 + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2

Simplify and combine like terms.

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Step 3.3.2.2.1.1.10.2.1

Simplify each term.

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Step 3.3.2.2.1.1.10.2.1.1

Multiply $370$ by $370$ .

$x = - \frac{7 \sqrt{\frac{136900 + 370 (- 35 \sqrt{74}) + 35 \sqrt{74} \cdot 370 + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.2

Multiply $- 35$ by $370$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 35 \sqrt{74} \cdot 370 + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.3

Multiply $370$ by $35$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} + 35 \sqrt{74} (- 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.4

Multiply $35 \sqrt{74} (- 35 \sqrt{74})$ .

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Step 3.3.2.2.1.1.10.2.1.4.1

Multiply $- 35$ by $35$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \sqrt{74} \sqrt{74}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.4.2

Raise $\sqrt{74}$ to the power of $1$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 (\sqrt{74} \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.4.3

Raise $\sqrt{74}$ to the power of $1$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 (\sqrt{74} \sqrt{74})}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.4.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 {\sqrt{74}}^{1 + 1}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.4.5

Add $1$ and $1$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 {\sqrt{74}}^{2}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 {\sqrt{74}}^{2}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.5

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 3.3.2.2.1.1.10.2.1.5.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 {(74^{\frac{1}{2}})}^{2}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.5.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74^{\frac{1}{2} \cdot 2}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.5.3

Combine $\frac{1}{2}$ and $2$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74^{\frac{2}{2}}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.5.4

Cancel the common factor of $2$ .

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Step 3.3.2.2.1.1.10.2.1.5.4.1

Cancel the common factor.

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74^{\frac{2}{2}}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.5.4.2

Rewrite the expression.

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.5.5

Evaluate the exponent.

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.1.6

Multiply $- 1225$ by $74$ .

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 90650}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{136900 - 12950 \sqrt{74} + 12950 \sqrt{74} - 90650}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.2

Subtract $90650$ from $136900$ .

$x = - \frac{7 \sqrt{\frac{46250 - 12950 \sqrt{74} + 12950 \sqrt{74}}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.3

Add $- 12950 \sqrt{74}$ and $12950 \sqrt{74}$ .

$x = - \frac{7 \sqrt{\frac{46250 + 0}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.10.2.4

Add $46250$ and $0$ .

$x = - \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.11

Multiply $74$ by $74$ .

$x = - \frac{7 \sqrt{\frac{46250}{5476}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.12

Cancel the common factor of $46250$ and $5476$ .

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Step 3.3.2.2.1.1.12.1

Factor $74$ out of $46250$ .

$x = - \frac{7 \sqrt{\frac{74 (625)}{5476}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.12.2

Cancel the common factors.

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Step 3.3.2.2.1.1.12.2.1

Factor $74$ out of $5476$ .

$x = - \frac{7 \sqrt{\frac{74 \cdot 625}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.12.2.2

Cancel the common factor.

$x = - \frac{7 \sqrt{\frac{74 \cdot 625}{74 \cdot 74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.12.2.3

Rewrite the expression.

$x = - \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.13

Rewrite $\sqrt{\frac{625}{74}}$ as $\frac{\sqrt{625}}{\sqrt{74}}$ .

$x = - \frac{7 (\frac{\sqrt{625}}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.14

Simplify the numerator.

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Step 3.3.2.2.1.1.14.1

Rewrite $625$ as $25^{2}$ .

$x = - \frac{7 (\frac{\sqrt{25^{2}}}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.14.2

Pull terms out from under the radical, assuming positive real numbers.

$x = - \frac{7 (\frac{25}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.15

Multiply $\frac{25}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$x = - \frac{7 (\frac{25}{\sqrt{74}} \cdot \frac{\sqrt{74}}{\sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16

Combine and simplify the denominator.

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Step 3.3.2.2.1.1.16.1

Multiply $\frac{25}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.2

Raise $\sqrt{74}$ to the power of $1$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.3

Raise $\sqrt{74}$ to the power of $1$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$x = - \frac{7 (\frac{25 \sqrt{74}}{{\sqrt{74}}^{1 + 1}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.5

Add $1$ and $1$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{{\sqrt{74}}^{2}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.6

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 3.3.2.2.1.1.16.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{{(74^{\frac{1}{2}})}^{2}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{1}{2} \cdot 2}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.6.3

Combine $\frac{1}{2}$ and $2$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{2}{2}}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.6.4

Cancel the common factor of $2$ .

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Step 3.3.2.2.1.1.16.6.4.1

Cancel the common factor.

$x = - \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{2}{2}}})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.6.4.2

Rewrite the expression.

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.1.16.6.5

Evaluate the exponent.

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.2

Combine $7$ and $\frac{25 \sqrt{74}}{74}$ .

$x = - \frac{\frac{7 (25 \sqrt{74})}{74}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.3

Multiply $7$ by $25$ .

$x = - \frac{\frac{175 \sqrt{74}}{74}}{5}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.4

Multiply the numerator by the reciprocal of the denominator.

$x = - (\frac{175 \sqrt{74}}{74} \cdot \frac{1}{5})$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.5

Cancel the common factor of $5$ .

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Step 3.3.2.2.1.5.1

Factor $5$ out of $175 \sqrt{74}$ .

$x = - (\frac{5 (35 \sqrt{74})}{74} \cdot \frac{1}{5})$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.5.2

Cancel the common factor.

$x = - (\frac{5 (35 \sqrt{74})}{74} \cdot \frac{1}{5})$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.3.2.2.1.5.3

Rewrite the expression.

$x = - \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = \frac{35 \sqrt{74}}{74}$

Step 3.4

Replace all occurrences of $y$ with $- \frac{35 \sqrt{74}}{74}$ in each equation.

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Step 3.4.1

Replace all occurrences of $y$ in $x = - \frac{7 \sqrt{(5 + y) (5 - y)}}{5}$ with $- \frac{35 \sqrt{74}}{74}$ .

$x = - \frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2

Simplify $x = - \frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$ .

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Step 3.4.2.1

Simplify the left side.

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Step 3.4.2.1.1

Remove parentheses.

$x = - \frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2

Simplify the right side.

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Step 3.4.2.2.1

Simplify $- \frac{7 \sqrt{(5 - \frac{35 \sqrt{74}}{74}) (5 - (- \frac{35 \sqrt{74}}{74}))}}{5}$ .

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Step 3.4.2.2.1.1

Simplify the numerator.

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Step 3.4.2.2.1.1.1

To write $5$ as a fraction with a common denominator, multiply by $\frac{74}{74}$ .

$x = - \frac{7 \sqrt{(5 \cdot \frac{74}{74} - \frac{35 \sqrt{74}}{74}) (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.2

Combine $5$ and $\frac{74}{74}$ .

$x = - \frac{7 \sqrt{(\frac{5 \cdot 74}{74} - \frac{35 \sqrt{74}}{74}) (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.3

Combine the numerators over the common denominator.

$x = - \frac{7 \sqrt{\frac{5 \cdot 74 - 35 \sqrt{74}}{74} \cdot (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.4

Multiply $5$ by $74$ .

$x = - \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.5

Multiply $- - \frac{35 \sqrt{74}}{74}$ .

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Step 3.4.2.2.1.1.5.1

Multiply $- 1$ by $- 1$ .

$x = - \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 + 1 (\frac{35 \sqrt{74}}{74}))}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.5.2

Multiply $\frac{35 \sqrt{74}}{74}$ by $1$ .

$x = - \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.6

To write $5$ as a fraction with a common denominator, multiply by $\frac{74}{74}$ .

$x = - \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (5 \cdot \frac{74}{74} + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.7

Combine $5$ and $\frac{74}{74}$ .

$x = - \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot (\frac{5 \cdot 74}{74} + \frac{35 \sqrt{74}}{74})}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.8

Combine the numerators over the common denominator.

$x = - \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot \frac{5 \cdot 74 + 35 \sqrt{74}}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.9

Multiply $5$ by $74$ .

$x = - \frac{7 \sqrt{\frac{370 - 35 \sqrt{74}}{74} \cdot \frac{370 + 35 \sqrt{74}}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.10

Multiply $\frac{370 - 35 \sqrt{74}}{74}$ by $\frac{370 + 35 \sqrt{74}}{74}$ .

$x = - \frac{7 \sqrt{\frac{(370 - 35 \sqrt{74}) (370 + 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11

Simplify the numerator.

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Step 3.4.2.2.1.1.11.1

Expand $(370 - 35 \sqrt{74}) (370 + 35 \sqrt{74})$ using the FOIL Method.

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Step 3.4.2.2.1.1.11.1.1

Apply the distributive property.

$x = - \frac{7 \sqrt{\frac{370 (370 + 35 \sqrt{74}) - 35 \sqrt{74} (370 + 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.1.2

Apply the distributive property.

$x = - \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (35 \sqrt{74}) - 35 \sqrt{74} (370 + 35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.1.3

Apply the distributive property.

$x = - \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (35 \sqrt{74}) - 35 \sqrt{74} \cdot 370 - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{370 \cdot 370 + 370 (35 \sqrt{74}) - 35 \sqrt{74} \cdot 370 - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2

Simplify and combine like terms.

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Step 3.4.2.2.1.1.11.2.1

Simplify each term.

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Step 3.4.2.2.1.1.11.2.1.1

Multiply $370$ by $370$ .

$x = - \frac{7 \sqrt{\frac{136900 + 370 (35 \sqrt{74}) - 35 \sqrt{74} \cdot 370 - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.2

Multiply $35$ by $370$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 35 \sqrt{74} \cdot 370 - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.3

Multiply $370$ by $- 35$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 35 \sqrt{74} (35 \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.4

Multiply $- 35 \sqrt{74} (35 \sqrt{74})$ .

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Step 3.4.2.2.1.1.11.2.1.4.1

Multiply $35$ by $- 35$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \sqrt{74} \sqrt{74}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.4.2

Raise $\sqrt{74}$ to the power of $1$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 (\sqrt{74} \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.4.3

Raise $\sqrt{74}$ to the power of $1$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 (\sqrt{74} \sqrt{74})}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.4.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 {\sqrt{74}}^{1 + 1}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.4.5

Add $1$ and $1$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 {\sqrt{74}}^{2}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 {\sqrt{74}}^{2}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.5

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 3.4.2.2.1.1.11.2.1.5.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 {(74^{\frac{1}{2}})}^{2}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.5.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74^{\frac{1}{2} \cdot 2}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.5.3

Combine $\frac{1}{2}$ and $2$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74^{\frac{2}{2}}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.5.4

Cancel the common factor of $2$ .

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Step 3.4.2.2.1.1.11.2.1.5.4.1

Cancel the common factor.

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74^{\frac{2}{2}}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.5.4.2

Rewrite the expression.

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.5.5

Evaluate the exponent.

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 1225 \cdot 74}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.1.6

Multiply $- 1225$ by $74$ .

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 90650}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{136900 + 12950 \sqrt{74} - 12950 \sqrt{74} - 90650}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.2

Subtract $90650$ from $136900$ .

$x = - \frac{7 \sqrt{\frac{46250 + 12950 \sqrt{74} - 12950 \sqrt{74}}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.3

Subtract $12950 \sqrt{74}$ from $12950 \sqrt{74}$ .

$x = - \frac{7 \sqrt{\frac{46250 + 0}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.11.2.4

Add $46250$ and $0$ .

$x = - \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{46250}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.12

Multiply $74$ by $74$ .

$x = - \frac{7 \sqrt{\frac{46250}{5476}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.13

Cancel the common factor of $46250$ and $5476$ .

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Step 3.4.2.2.1.1.13.1

Factor $74$ out of $46250$ .

$x = - \frac{7 \sqrt{\frac{74 (625)}{5476}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.13.2

Cancel the common factors.

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Step 3.4.2.2.1.1.13.2.1

Factor $74$ out of $5476$ .

$x = - \frac{7 \sqrt{\frac{74 \cdot 625}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.13.2.2

Cancel the common factor.

$x = - \frac{7 \sqrt{\frac{74 \cdot 625}{74 \cdot 74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.13.2.3

Rewrite the expression.

$x = - \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 \sqrt{\frac{625}{74}}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.14

Rewrite $\sqrt{\frac{625}{74}}$ as $\frac{\sqrt{625}}{\sqrt{74}}$ .

$x = - \frac{7 (\frac{\sqrt{625}}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.15

Simplify the numerator.

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Step 3.4.2.2.1.1.15.1

Rewrite $625$ as $25^{2}$ .

$x = - \frac{7 (\frac{\sqrt{25^{2}}}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.15.2

Pull terms out from under the radical, assuming positive real numbers.

$x = - \frac{7 (\frac{25}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.16

Multiply $\frac{25}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$x = - \frac{7 (\frac{25}{\sqrt{74}} \cdot \frac{\sqrt{74}}{\sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17

Combine and simplify the denominator.

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Step 3.4.2.2.1.1.17.1

Multiply $\frac{25}{\sqrt{74}}$ by $\frac{\sqrt{74}}{\sqrt{74}}$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.2

Raise $\sqrt{74}$ to the power of $1$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.3

Raise $\sqrt{74}$ to the power of $1$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{\sqrt{74} \sqrt{74}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$x = - \frac{7 (\frac{25 \sqrt{74}}{{\sqrt{74}}^{1 + 1}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.5

Add $1$ and $1$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{{\sqrt{74}}^{2}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.6

Rewrite ${\sqrt{74}}^{2}$ as $74$ .

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Step 3.4.2.2.1.1.17.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{74}$ as $74^{\frac{1}{2}}$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{{(74^{\frac{1}{2}})}^{2}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{1}{2} \cdot 2}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.6.3

Combine $\frac{1}{2}$ and $2$ .

$x = - \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{2}{2}}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.6.4

Cancel the common factor of $2$ .

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Step 3.4.2.2.1.1.17.6.4.1

Cancel the common factor.

$x = - \frac{7 (\frac{25 \sqrt{74}}{74^{\frac{2}{2}}})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.6.4.2

Rewrite the expression.

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.1.17.6.5

Evaluate the exponent.

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{7 (\frac{25 \sqrt{74}}{74})}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.2

Combine $7$ and $\frac{25 \sqrt{74}}{74}$ .

$x = - \frac{\frac{7 (25 \sqrt{74})}{74}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.3

Multiply $7$ by $25$ .

$x = - \frac{\frac{175 \sqrt{74}}{74}}{5}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.4

Multiply the numerator by the reciprocal of the denominator.

$x = - (\frac{175 \sqrt{74}}{74} \cdot \frac{1}{5})$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.5

Cancel the common factor of $5$ .

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Step 3.4.2.2.1.5.1

Factor $5$ out of $175 \sqrt{74}$ .

$x = - (\frac{5 (35 \sqrt{74})}{74} \cdot \frac{1}{5})$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.5.2

Cancel the common factor.

$x = - (\frac{5 (35 \sqrt{74})}{74} \cdot \frac{1}{5})$

$y = - \frac{35 \sqrt{74}}{74}$

Step 3.4.2.2.1.5.3

Rewrite the expression.

$x = - \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}$

$y = - \frac{35 \sqrt{74}}{74}$

Step 4

The solution to the system is the complete set of ordered pairs that are valid solutions.

$(\frac{35 \sqrt{74}}{74}, \frac{35 \sqrt{74}}{74})$

$(\frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74})$

$(- \frac{35 \sqrt{74}}{74}, \frac{35 \sqrt{74}}{74})$

$(- \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74})$

Step 5

The result can be shown in multiple forms.

Point Form:

$(\frac{35 \sqrt{74}}{74}, \frac{35 \sqrt{74}}{74}), (\frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74}), (- \frac{35 \sqrt{74}}{74}, \frac{35 \sqrt{74}}{74}), (- \frac{35 \sqrt{74}}{74}, - \frac{35 \sqrt{74}}{74})$

Equation Form:

$x = \frac{35 \sqrt{74}}{74}, y = \frac{35 \sqrt{74}}{74}$

$x = \frac{35 \sqrt{74}}{74}, y = - \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}, y = \frac{35 \sqrt{74}}{74}$

$x = - \frac{35 \sqrt{74}}{74}, y = - \frac{35 \sqrt{74}}{74}$

Step 6