Precalculus Examples

$x^{2} - y^{2} = 35$ , $4 x + 2 y = 24$

Step 1

Solve for $x$ in $4 x + 2 y = 24$ .

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Step 1.1

Subtract $2 y$ from both sides of the equation.

$4 x = 24 - 2 y$

$x^{2} - y^{2} = 35$

Step 1.2

Divide each term in $4 x = 24 - 2 y$ by $4$ and simplify.

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Step 1.2.1

Divide each term in $4 x = 24 - 2 y$ by $4$ .

$\frac{4 x}{4} = \frac{24}{4} + \frac{- 2 y}{4}$

$x^{2} - y^{2} = 35$

Step 1.2.2

Simplify the left side.

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Step 1.2.2.1

Cancel the common factor of $4$ .

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Step 1.2.2.1.1

Cancel the common factor.

$\frac{4 x}{4} = \frac{24}{4} + \frac{- 2 y}{4}$

$x^{2} - y^{2} = 35$

Step 1.2.2.1.2

Divide $x$ by $1$ .

$x = \frac{24}{4} + \frac{- 2 y}{4}$

$x^{2} - y^{2} = 35$

$x = \frac{24}{4} + \frac{- 2 y}{4}$

$x^{2} - y^{2} = 35$

$x = \frac{24}{4} + \frac{- 2 y}{4}$

$x^{2} - y^{2} = 35$

Step 1.2.3

Simplify the right side.

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Step 1.2.3.1

Simplify each term.

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Step 1.2.3.1.1

Divide $24$ by $4$ .

$x = 6 + \frac{- 2 y}{4}$

$x^{2} - y^{2} = 35$

Step 1.2.3.1.2

Cancel the common factor of $- 2$ and $4$ .

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Step 1.2.3.1.2.1

Factor $2$ out of $- 2 y$ .

$x = 6 + \frac{2 (- y)}{4}$

$x^{2} - y^{2} = 35$

Step 1.2.3.1.2.2

Cancel the common factors.

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Step 1.2.3.1.2.2.1

Factor $2$ out of $4$ .

$x = 6 + \frac{2 (- y)}{2 (2)}$

$x^{2} - y^{2} = 35$

Step 1.2.3.1.2.2.2

Cancel the common factor.

$x = 6 + \frac{2 (- y)}{2 \cdot 2}$

$x^{2} - y^{2} = 35$

Step 1.2.3.1.2.2.3

Rewrite the expression.

$x = 6 + \frac{- y}{2}$

$x^{2} - y^{2} = 35$

$x = 6 + \frac{- y}{2}$

$x^{2} - y^{2} = 35$

$x = 6 + \frac{- y}{2}$

$x^{2} - y^{2} = 35$

Step 1.2.3.1.3

Move the negative in front of the fraction.

$x = 6 - \frac{y}{2}$

$x^{2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$x^{2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$x^{2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$x^{2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$x^{2} - y^{2} = 35$

Step 2

Replace all occurrences of $x$ with $6 - \frac{y}{2}$ in each equation.

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Step 2.1

Replace all occurrences of $x$ in $x^{2} - y^{2} = 35$ with $6 - \frac{y}{2}$ .

${(6 - \frac{y}{2})}^{2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify ${(6 - \frac{y}{2})}^{2} - y^{2}$ .

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Step 2.2.1.1

Simplify each term.

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Step 2.2.1.1.1

Rewrite ${(6 - \frac{y}{2})}^{2}$ as $(6 - \frac{y}{2}) (6 - \frac{y}{2})$ .

$(6 - \frac{y}{2}) (6 - \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.2

Expand $(6 - \frac{y}{2}) (6 - \frac{y}{2})$ using the FOIL Method.

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Step 2.2.1.1.2.1

Apply the distributive property.

$6 (6 - \frac{y}{2}) - \frac{y}{2} \cdot (6 - \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.2.2

Apply the distributive property.

$6 \cdot 6 + 6 (- \frac{y}{2}) - \frac{y}{2} \cdot (6 - \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.2.3

Apply the distributive property.

$6 \cdot 6 + 6 (- \frac{y}{2}) - \frac{y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$6 \cdot 6 + 6 (- \frac{y}{2}) - \frac{y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3

Simplify and combine like terms.

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Step 2.2.1.1.3.1

Simplify each term.

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Step 2.2.1.1.3.1.1

Multiply $6$ by $6$ .

$36 + 6 (- \frac{y}{2}) - \frac{y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.2

Cancel the common factor of $2$ .

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Step 2.2.1.1.3.1.2.1

Move the leading negative in $- \frac{y}{2}$ into the numerator.

$36 + 6 (\frac{- y}{2}) - \frac{y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.2.2

Factor $2$ out of $6$ .

$36 + 2 (3) (\frac{- y}{2}) - \frac{y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.2.3

Cancel the common factor.

$36 + 2 \cdot (3 (\frac{- y}{2})) - \frac{y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.2.4

Rewrite the expression.

$36 + 3 (- y) - \frac{y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$36 + 3 (- y) - \frac{y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.3

Multiply $- 1$ by $3$ .

$36 - 3 y - \frac{y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.4

Cancel the common factor of $2$ .

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Step 2.2.1.1.3.1.4.1

Move the leading negative in $- \frac{y}{2}$ into the numerator.

$36 - 3 y + \frac{- y}{2} \cdot 6 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.4.2

Factor $2$ out of $6$ .

$36 - 3 y + \frac{- y}{2} \cdot (2 (3)) - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.4.3

Cancel the common factor.

$36 - 3 y + \frac{- y}{2} \cdot (2 \cdot 3) - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.4.4

Rewrite the expression.

$36 - 3 y - y \cdot 3 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$36 - 3 y - y \cdot 3 - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.5

Multiply $3$ by $- 1$ .

$36 - 3 y - 3 y - \frac{y}{2} \cdot (- \frac{y}{2}) - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.6

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

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Step 2.2.1.1.3.1.6.1

Multiply $- 1$ by $- 1$ .

$36 - 3 y - 3 y + 1 (\frac{y}{2}) \cdot \frac{y}{2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.6.2

Multiply $\frac{y}{2}$ by $1$ .

$36 - 3 y - 3 y + \frac{y}{2} \cdot \frac{y}{2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.6.3

Multiply $\frac{y}{2}$ by $\frac{y}{2}$ .

$36 - 3 y - 3 y + \frac{y \cdot y}{2 \cdot 2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.6.4

Raise $y$ to the power of $1$ .

$36 - 3 y - 3 y + \frac{y \cdot y}{2 \cdot 2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.6.5

Raise $y$ to the power of $1$ .

$36 - 3 y - 3 y + \frac{y \cdot y}{2 \cdot 2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.6.6

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

$36 - 3 y - 3 y + \frac{y^{1 + 1}}{2 \cdot 2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.6.7

Add $1$ and $1$ .

$36 - 3 y - 3 y + \frac{y^{2}}{2 \cdot 2} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.1.6.8

Multiply $2$ by $2$ .

$36 - 3 y - 3 y + \frac{y^{2}}{4} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$36 - 3 y - 3 y + \frac{y^{2}}{4} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$36 - 3 y - 3 y + \frac{y^{2}}{4} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.1.3.2

Subtract $3 y$ from $- 3 y$ .

$36 - 6 y + \frac{y^{2}}{4} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$36 - 6 y + \frac{y^{2}}{4} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

$36 - 6 y + \frac{y^{2}}{4} - y^{2} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.2

To write $- y^{2}$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$36 - 6 y + \frac{y^{2}}{4} - y^{2} \cdot \frac{4}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.3

Simplify terms.

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Step 2.2.1.3.1

Combine $- y^{2}$ and $\frac{4}{4}$ .

$36 - 6 y + \frac{y^{2}}{4} + \frac{- y^{2} \cdot 4}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.3.2

Combine the numerators over the common denominator.

$36 - 6 y + \frac{y^{2} - y^{2} \cdot 4}{4} = 35$

$x = 6 - \frac{y}{2}$

$36 - 6 y + \frac{y^{2} - y^{2} \cdot 4}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.4

Simplify each term.

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Step 2.2.1.4.1

Simplify the numerator.

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Step 2.2.1.4.1.1

Factor $y^{2}$ out of $y^{2} - y^{2} \cdot 4$ .

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Step 2.2.1.4.1.1.1

Multiply by $1$ .

$36 - 6 y + \frac{y^{2} \cdot 1 - y^{2} \cdot 4}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.4.1.1.2

Factor $y^{2}$ out of $- y^{2} \cdot 4$ .

$36 - 6 y + \frac{y^{2} \cdot 1 + y^{2} (- 1 \cdot 4)}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.4.1.1.3

Factor $y^{2}$ out of $y^{2} \cdot 1 + y^{2} (- 1 \cdot 4)$ .

$36 - 6 y + \frac{y^{2} (1 - 1 \cdot 4)}{4} = 35$

$x = 6 - \frac{y}{2}$

$36 - 6 y + \frac{y^{2} (1 - 1 \cdot 4)}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.4.1.2

Multiply $- 1$ by $4$ .

$36 - 6 y + \frac{y^{2} (1 - 4)}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.4.1.3

Subtract $4$ from $1$ .

$36 - 6 y + \frac{y^{2} \cdot - 3}{4} = 35$

$x = 6 - \frac{y}{2}$

$36 - 6 y + \frac{y^{2} \cdot - 3}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.4.2

Move $- 3$ to the left of $y^{2}$ .

$36 - 6 y + \frac{- 3 \cdot y^{2}}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 2.2.1.4.3

Move the negative in front of the fraction.

$36 - 6 y - \frac{3 y^{2}}{4} = 35$

$x = 6 - \frac{y}{2}$

$36 - 6 y - \frac{3 y^{2}}{4} = 35$

$x = 6 - \frac{y}{2}$

$36 - 6 y - \frac{3 y^{2}}{4} = 35$

$x = 6 - \frac{y}{2}$

$36 - 6 y - \frac{3 y^{2}}{4} = 35$

$x = 6 - \frac{y}{2}$

$36 - 6 y - \frac{3 y^{2}}{4} = 35$

$x = 6 - \frac{y}{2}$

Step 3

Solve for $y$ in $36 - 6 y - \frac{3 y^{2}}{4} = 35$ .

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Step 3.1

Move all terms to the left side of the equation and simplify.

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Step 3.1.1

Subtract $35$ from both sides of the equation.

$36 - 6 y - \frac{3 y^{2}}{4} - 35 = 0$

$x = 6 - \frac{y}{2}$

Step 3.1.2

Subtract $35$ from $36$ .

$- 6 y - \frac{3 y^{2}}{4} + 1 = 0$

$x = 6 - \frac{y}{2}$

$- 6 y - \frac{3 y^{2}}{4} + 1 = 0$

$x = 6 - \frac{y}{2}$

Step 3.2

Multiply through by the least common denominator $4$ , then simplify.

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Step 3.2.1

Apply the distributive property.

$4 (- 6 y) + 4 (- \frac{3 y^{2}}{4}) + 4 \cdot 1 = 0$

$x = 6 - \frac{y}{2}$

Step 3.2.2

Simplify.

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Step 3.2.2.1

Multiply $- 6$ by $4$ .

$- 24 y + 4 (- \frac{3 y^{2}}{4}) + 4 \cdot 1 = 0$

$x = 6 - \frac{y}{2}$

Step 3.2.2.2

Cancel the common factor of $4$ .

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Step 3.2.2.2.1

Move the leading negative in $- \frac{3 y^{2}}{4}$ into the numerator.

$- 24 y + 4 (\frac{- 3 y^{2}}{4}) + 4 \cdot 1 = 0$

$x = 6 - \frac{y}{2}$

Step 3.2.2.2.2

Cancel the common factor.

$- 24 y + 4 (\frac{- 3 y^{2}}{4}) + 4 \cdot 1 = 0$

$x = 6 - \frac{y}{2}$

Step 3.2.2.2.3

Rewrite the expression.

$- 24 y - 3 y^{2} + 4 \cdot 1 = 0$

$x = 6 - \frac{y}{2}$

$- 24 y - 3 y^{2} + 4 \cdot 1 = 0$

$x = 6 - \frac{y}{2}$

Step 3.2.2.3

Multiply $4$ by $1$ .

$- 24 y - 3 y^{2} + 4 = 0$

$x = 6 - \frac{y}{2}$

$- 24 y - 3 y^{2} + 4 = 0$

$x = 6 - \frac{y}{2}$

Step 3.2.3

Reorder $- 24 y$ and $- 3 y^{2}$ .

$- 3 y^{2} - 24 y + 4 = 0$

$x = 6 - \frac{y}{2}$

$- 3 y^{2} - 24 y + 4 = 0$

$x = 6 - \frac{y}{2}$

Step 3.3

Use the quadratic formula to find the solutions.

$\frac{- b \pm \sqrt{b^{2} - 4 (a c)}}{2 a}$

$x = 6 - \frac{y}{2}$

Step 3.4

Substitute the values $a = - 3$ , $b = - 24$ , and $c = 4$ into the quadratic formula and solve for $y$ .

$\frac{24 \pm \sqrt{{(- 24)}^{2} - 4 \cdot (- 3 \cdot 4)}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.5

Simplify.

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Step 3.5.1

Simplify the numerator.

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Step 3.5.1.1

Raise $- 24$ to the power of $2$ .

$y = \frac{24 \pm \sqrt{576 - 4 \cdot - 3 \cdot 4}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.5.1.2

Multiply $- 4 \cdot - 3 \cdot 4$ .

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Step 3.5.1.2.1

Multiply $- 4$ by $- 3$ .

$y = \frac{24 \pm \sqrt{576 + 12 \cdot 4}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.5.1.2.2

Multiply $12$ by $4$ .

$y = \frac{24 \pm \sqrt{576 + 48}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

$y = \frac{24 \pm \sqrt{576 + 48}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.5.1.3

Add $576$ and $48$ .

$y = \frac{24 \pm \sqrt{624}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.5.1.4

Rewrite $624$ as $4^{2} \cdot 39$ .

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Step 3.5.1.4.1

Factor $16$ out of $624$ .

$y = \frac{24 \pm \sqrt{16 (39)}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.5.1.4.2

Rewrite $16$ as $4^{2}$ .

$y = \frac{24 \pm \sqrt{4^{2} \cdot 39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

$y = \frac{24 \pm \sqrt{4^{2} \cdot 39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.5.1.5

Pull terms out from under the radical.

$y = \frac{24 \pm 4 \sqrt{39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

$y = \frac{24 \pm 4 \sqrt{39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.5.2

Multiply $2$ by $- 3$ .

$y = \frac{24 \pm 4 \sqrt{39}}{- 6}$

$x = 6 - \frac{y}{2}$

Step 3.5.3

Simplify $\frac{24 \pm 4 \sqrt{39}}{- 6}$ .

$y = \frac{12 \pm 2 \sqrt{39}}{- 3}$

$x = 6 - \frac{y}{2}$

Step 3.5.4

Move the negative in front of the fraction.

$y = - \frac{12 \pm 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

$y = - \frac{12 \pm 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

Step 3.6

Simplify the expression to solve for the $+$ portion of the $\pm$ .

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Step 3.6.1

Simplify the numerator.

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Step 3.6.1.1

Raise $- 24$ to the power of $2$ .

$y = \frac{24 \pm \sqrt{576 - 4 \cdot - 3 \cdot 4}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.6.1.2

Multiply $- 4 \cdot - 3 \cdot 4$ .

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Step 3.6.1.2.1

Multiply $- 4$ by $- 3$ .

$y = \frac{24 \pm \sqrt{576 + 12 \cdot 4}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.6.1.2.2

Multiply $12$ by $4$ .

$y = \frac{24 \pm \sqrt{576 + 48}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

$y = \frac{24 \pm \sqrt{576 + 48}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.6.1.3

Add $576$ and $48$ .

$y = \frac{24 \pm \sqrt{624}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.6.1.4

Rewrite $624$ as $4^{2} \cdot 39$ .

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Step 3.6.1.4.1

Factor $16$ out of $624$ .

$y = \frac{24 \pm \sqrt{16 (39)}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.6.1.4.2

Rewrite $16$ as $4^{2}$ .

$y = \frac{24 \pm \sqrt{4^{2} \cdot 39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

$y = \frac{24 \pm \sqrt{4^{2} \cdot 39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.6.1.5

Pull terms out from under the radical.

$y = \frac{24 \pm 4 \sqrt{39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

$y = \frac{24 \pm 4 \sqrt{39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.6.2

Multiply $2$ by $- 3$ .

$y = \frac{24 \pm 4 \sqrt{39}}{- 6}$

$x = 6 - \frac{y}{2}$

Step 3.6.3

Simplify $\frac{24 \pm 4 \sqrt{39}}{- 6}$ .

$y = \frac{12 \pm 2 \sqrt{39}}{- 3}$

$x = 6 - \frac{y}{2}$

Step 3.6.4

Move the negative in front of the fraction.

$y = - \frac{12 \pm 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

Step 3.6.5

Change the $\pm$ to $+$ .

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

Step 3.7

Simplify the expression to solve for the $-$ portion of the $\pm$ .

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Step 3.7.1

Simplify the numerator.

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Step 3.7.1.1

Raise $- 24$ to the power of $2$ .

$y = \frac{24 \pm \sqrt{576 - 4 \cdot - 3 \cdot 4}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.7.1.2

Multiply $- 4 \cdot - 3 \cdot 4$ .

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Step 3.7.1.2.1

Multiply $- 4$ by $- 3$ .

$y = \frac{24 \pm \sqrt{576 + 12 \cdot 4}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.7.1.2.2

Multiply $12$ by $4$ .

$y = \frac{24 \pm \sqrt{576 + 48}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

$y = \frac{24 \pm \sqrt{576 + 48}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.7.1.3

Add $576$ and $48$ .

$y = \frac{24 \pm \sqrt{624}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.7.1.4

Rewrite $624$ as $4^{2} \cdot 39$ .

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Step 3.7.1.4.1

Factor $16$ out of $624$ .

$y = \frac{24 \pm \sqrt{16 (39)}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.7.1.4.2

Rewrite $16$ as $4^{2}$ .

$y = \frac{24 \pm \sqrt{4^{2} \cdot 39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

$y = \frac{24 \pm \sqrt{4^{2} \cdot 39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.7.1.5

Pull terms out from under the radical.

$y = \frac{24 \pm 4 \sqrt{39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

$y = \frac{24 \pm 4 \sqrt{39}}{2 \cdot - 3}$

$x = 6 - \frac{y}{2}$

Step 3.7.2

Multiply $2$ by $- 3$ .

$y = \frac{24 \pm 4 \sqrt{39}}{- 6}$

$x = 6 - \frac{y}{2}$

Step 3.7.3

Simplify $\frac{24 \pm 4 \sqrt{39}}{- 6}$ .

$y = \frac{12 \pm 2 \sqrt{39}}{- 3}$

$x = 6 - \frac{y}{2}$

Step 3.7.4

Move the negative in front of the fraction.

$y = - \frac{12 \pm 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

Step 3.7.5

Change the $\pm$ to $-$ .

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

Step 3.8

The final answer is the combination of both solutions.

$y = - \frac{12 + 2 \sqrt{39}}{3}, - \frac{12 - 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

$y = - \frac{12 + 2 \sqrt{39}}{3}, - \frac{12 - 2 \sqrt{39}}{3}$

$x = 6 - \frac{y}{2}$

Step 4

Replace all occurrences of $y$ with $- \frac{12 + 2 \sqrt{39}}{3}$ in each equation.

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Step 4.1

Replace all occurrences of $y$ in $x = 6 - \frac{y}{2}$ with $- \frac{12 + 2 \sqrt{39}}{3}$ .

$x = 6 - \frac{- \frac{12 + 2 \sqrt{39}}{3}}{2}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2

Simplify the right side.

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Step 4.2.1

Simplify $6 - \frac{- \frac{12 + 2 \sqrt{39}}{3}}{2}$ .

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Step 4.2.1.1

Simplify each term.

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Step 4.2.1.1.1

Multiply the numerator by the reciprocal of the denominator.

$x = 6 - (- \frac{12 + 2 \sqrt{39}}{3} \cdot \frac{1}{2})$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.2

Multiply $- \frac{12 + 2 \sqrt{39}}{3} \cdot \frac{1}{2}$ .

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Step 4.2.1.1.2.1

Multiply $\frac{1}{2}$ by $\frac{12 + 2 \sqrt{39}}{3}$ .

$x = 6 + \frac{12 + 2 \sqrt{39}}{2 \cdot 3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.2.2

Multiply $2$ by $3$ .

$x = 6 + \frac{12 + 2 \sqrt{39}}{6}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = 6 + \frac{12 + 2 \sqrt{39}}{6}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.3

Cancel the common factor of $12 + 2 \sqrt{39}$ and $6$ .

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Step 4.2.1.1.3.1

Factor $2$ out of $12$ .

$x = 6 + \frac{2 \cdot 6 + 2 \sqrt{39}}{6}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.3.2

Factor $2$ out of $2 \sqrt{39}$ .

$x = 6 + \frac{2 \cdot 6 + 2 (\sqrt{39})}{6}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.3.3

Factor $2$ out of $2 \cdot 6 + 2 (\sqrt{39})$ .

$x = 6 + \frac{2 \cdot (6 + \sqrt{39})}{6}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.3.4

Cancel the common factors.

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Step 4.2.1.1.3.4.1

Factor $2$ out of $6$ .

$x = 6 + \frac{2 \cdot (6 + \sqrt{39})}{2 (3)}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.3.4.2

Cancel the common factor.

$x = 6 + \frac{2 \cdot (6 + \sqrt{39})}{2 \cdot 3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.3.4.3

Rewrite the expression.

$x = 6 + \frac{6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = 6 + \frac{6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = 6 + \frac{6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.4

Multiply $- - \frac{6 + \sqrt{39}}{3}$ .

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Step 4.2.1.1.4.1

Multiply $- 1$ by $- 1$ .

$x = 6 + 1 (\frac{6 + \sqrt{39}}{3})$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.1.4.2

Multiply $\frac{6 + \sqrt{39}}{3}$ by $1$ .

$x = 6 + \frac{6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = 6 + \frac{6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = 6 + \frac{6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.2

To write $6$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$x = 6 \cdot \frac{3}{3} + \frac{6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.3

Combine fractions.

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Step 4.2.1.3.1

Combine $6$ and $\frac{3}{3}$ .

$x = \frac{6 \cdot 3}{3} + \frac{6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.3.2

Combine the numerators over the common denominator.

$x = \frac{6 \cdot 3 + 6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = \frac{6 \cdot 3 + 6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.4

Simplify the numerator.

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Step 4.2.1.4.1

Multiply $6$ by $3$ .

$x = \frac{18 + 6 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 4.2.1.4.2

Add $18$ and $6$ .

$x = \frac{24 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = \frac{24 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = \frac{24 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = \frac{24 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = \frac{24 + \sqrt{39}}{3}$

$y = - \frac{12 + 2 \sqrt{39}}{3}$

Step 5

Replace all occurrences of $y$ with $- \frac{12 - 2 \sqrt{39}}{3}$ in each equation.

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Step 5.1

Replace all occurrences of $y$ in $x = 6 - \frac{y}{2}$ with $- \frac{12 - 2 \sqrt{39}}{3}$ .

$x = 6 - \frac{- \frac{12 - 2 \sqrt{39}}{3}}{2}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2

Simplify the right side.

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Step 5.2.1

Simplify $6 - \frac{- \frac{12 - 2 \sqrt{39}}{3}}{2}$ .

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Step 5.2.1.1

Simplify each term.

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Step 5.2.1.1.1

Multiply the numerator by the reciprocal of the denominator.

$x = 6 - (- \frac{12 - 2 \sqrt{39}}{3} \cdot \frac{1}{2})$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.2

Multiply $- \frac{12 - 2 \sqrt{39}}{3} \cdot \frac{1}{2}$ .

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Step 5.2.1.1.2.1

Multiply $\frac{1}{2}$ by $\frac{12 - 2 \sqrt{39}}{3}$ .

$x = 6 + \frac{12 - 2 \sqrt{39}}{2 \cdot 3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.2.2

Multiply $2$ by $3$ .

$x = 6 + \frac{12 - 2 \sqrt{39}}{6}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = 6 + \frac{12 - 2 \sqrt{39}}{6}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.3

Cancel the common factor of $12 - 2 \sqrt{39}$ and $6$ .

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Step 5.2.1.1.3.1

Factor $2$ out of $12$ .

$x = 6 + \frac{2 (6) - 2 \sqrt{39}}{6}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.3.2

Factor $2$ out of $- 2 \sqrt{39}$ .

$x = 6 + \frac{2 (6) + 2 (- \sqrt{39})}{6}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.3.3

Factor $2$ out of $2 (6) + 2 (- \sqrt{39})$ .

$x = 6 + \frac{2 (6 - \sqrt{39})}{6}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.3.4

Cancel the common factors.

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Step 5.2.1.1.3.4.1

Factor $2$ out of $6$ .

$x = 6 + \frac{2 (6 - \sqrt{39})}{2 \cdot 3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.3.4.2

Cancel the common factor.

$x = 6 + \frac{2 (6 - \sqrt{39})}{2 \cdot 3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.3.4.3

Rewrite the expression.

$x = 6 + \frac{6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = 6 + \frac{6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = 6 + \frac{6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.4

Multiply $- - \frac{6 - \sqrt{39}}{3}$ .

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Step 5.2.1.1.4.1

Multiply $- 1$ by $- 1$ .

$x = 6 + 1 (\frac{6 - \sqrt{39}}{3})$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.1.4.2

Multiply $\frac{6 - \sqrt{39}}{3}$ by $1$ .

$x = 6 + \frac{6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = 6 + \frac{6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = 6 + \frac{6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.2

To write $6$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$x = 6 \cdot \frac{3}{3} + \frac{6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.3

Combine fractions.

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Step 5.2.1.3.1

Combine $6$ and $\frac{3}{3}$ .

$x = \frac{6 \cdot 3}{3} + \frac{6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.3.2

Combine the numerators over the common denominator.

$x = \frac{6 \cdot 3 + 6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = \frac{6 \cdot 3 + 6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.4

Simplify the numerator.

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Step 5.2.1.4.1

Multiply $6$ by $3$ .

$x = \frac{18 + 6 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 5.2.1.4.2

Add $18$ and $6$ .

$x = \frac{24 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = \frac{24 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = \frac{24 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = \frac{24 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

$x = \frac{24 - \sqrt{39}}{3}$

$y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 6

The solution to the system is the complete set of ordered pairs that are valid solutions.

$(\frac{24 + \sqrt{39}}{3}, - \frac{12 + 2 \sqrt{39}}{3})$

$(\frac{24 - \sqrt{39}}{3}, - \frac{12 - 2 \sqrt{39}}{3})$

Step 7

The result can be shown in multiple forms.

Point Form:

$(\frac{24 + \sqrt{39}}{3}, - \frac{12 + 2 \sqrt{39}}{3}), (\frac{24 - \sqrt{39}}{3}, - \frac{12 - 2 \sqrt{39}}{3})$

Equation Form:

$x = \frac{24 + \sqrt{39}}{3}, y = - \frac{12 + 2 \sqrt{39}}{3}$

$x = \frac{24 - \sqrt{39}}{3}, y = - \frac{12 - 2 \sqrt{39}}{3}$

Step 8