Trigonometry Examples

$\frac{\sqrt{74} (2 - a)}{v ({(2 - a)}^{2} + {(3 - b)}^{2})} = 5$

Step 1

Factor each term.

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Step 1.1

Rewrite ${(2 - a)}^{2}$ as $(2 - a) (2 - a)$ .

$\frac{\sqrt{74} (2 - a)}{v ((2 - a) (2 - a) + {(3 - b)}^{2})} = 5$

Step 1.2

Expand $(2 - a) (2 - a)$ using the FOIL Method.

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Step 1.2.1

Apply the distributive property.

$\frac{\sqrt{74} (2 - a)}{v (2 (2 - a) - a (2 - a) + {(3 - b)}^{2})} = 5$

Step 1.2.2

Apply the distributive property.

$\frac{\sqrt{74} (2 - a)}{v (2 \cdot 2 + 2 (- a) - a (2 - a) + {(3 - b)}^{2})} = 5$

Step 1.2.3

Apply the distributive property.

$\frac{\sqrt{74} (2 - a)}{v (2 \cdot 2 + 2 (- a) - a \cdot 2 - a (- a) + {(3 - b)}^{2})} = 5$

Step 1.3

Simplify and combine like terms.

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Step 1.3.1

Simplify each term.

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Step 1.3.1.1

Multiply $2$ by $2$ .

$\frac{\sqrt{74} (2 - a)}{v (4 + 2 (- a) - a \cdot 2 - a (- a) + {(3 - b)}^{2})} = 5$

Step 1.3.1.2

Multiply $- 1$ by $2$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 2 a - a \cdot 2 - a (- a) + {(3 - b)}^{2})} = 5$

Step 1.3.1.3

Multiply $2$ by $- 1$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 2 a - 2 a - a (- a) + {(3 - b)}^{2})} = 5$

Step 1.3.1.4

Rewrite using the commutative property of multiplication.

$\frac{\sqrt{74} (2 - a)}{v (4 - 2 a - 2 a - 1 \cdot - 1 a \cdot a + {(3 - b)}^{2})} = 5$

Step 1.3.1.5

Multiply $a$ by $a$ by adding the exponents.

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Step 1.3.1.5.1

Move $a$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 2 a - 2 a - 1 \cdot - 1 (a \cdot a) + {(3 - b)}^{2})} = 5$

Step 1.3.1.5.2

Multiply $a$ by $a$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 2 a - 2 a - 1 \cdot - 1 a^{2} + {(3 - b)}^{2})} = 5$

Step 1.3.1.6

Multiply $- 1$ by $- 1$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 2 a - 2 a + 1 a^{2} + {(3 - b)}^{2})} = 5$

Step 1.3.1.7

Multiply $a^{2}$ by $1$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 2 a - 2 a + a^{2} + {(3 - b)}^{2})} = 5$

Step 1.3.2

Subtract $2 a$ from $- 2 a$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + {(3 - b)}^{2})} = 5$

Step 1.4

Rewrite ${(3 - b)}^{2}$ as $(3 - b) (3 - b)$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + (3 - b) (3 - b))} = 5$

Step 1.5

Expand $(3 - b) (3 - b)$ using the FOIL Method.

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Step 1.5.1

Apply the distributive property.

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 3 (3 - b) - b (3 - b))} = 5$

Step 1.5.2

Apply the distributive property.

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 3 \cdot 3 + 3 (- b) - b (3 - b))} = 5$

Step 1.5.3

Apply the distributive property.

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 3 \cdot 3 + 3 (- b) - b \cdot 3 - b (- b))} = 5$

Step 1.6

Simplify and combine like terms.

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Step 1.6.1

Simplify each term.

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Step 1.6.1.1

Multiply $3$ by $3$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 9 + 3 (- b) - b \cdot 3 - b (- b))} = 5$

Step 1.6.1.2

Multiply $- 1$ by $3$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 9 - 3 b - b \cdot 3 - b (- b))} = 5$

Step 1.6.1.3

Multiply $3$ by $- 1$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 9 - 3 b - 3 b - b (- b))} = 5$

Step 1.6.1.4

Rewrite using the commutative property of multiplication.

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 9 - 3 b - 3 b - 1 \cdot - 1 b \cdot b)} = 5$

Step 1.6.1.5

Multiply $b$ by $b$ by adding the exponents.

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Step 1.6.1.5.1

Move $b$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 9 - 3 b - 3 b - 1 \cdot - 1 (b \cdot b))} = 5$

Step 1.6.1.5.2

Multiply $b$ by $b$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 9 - 3 b - 3 b - 1 \cdot - 1 b^{2})} = 5$

Step 1.6.1.6

Multiply $- 1$ by $- 1$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 9 - 3 b - 3 b + 1 b^{2})} = 5$

Step 1.6.1.7

Multiply $b^{2}$ by $1$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 9 - 3 b - 3 b + b^{2})} = 5$

Step 1.6.2

Subtract $3 b$ from $- 3 b$ .

$\frac{\sqrt{74} (2 - a)}{v (4 - 4 a + a^{2} + 9 - 6 b + b^{2})} = 5$

Step 1.7

Add $4$ and $9$ .

$\frac{\sqrt{74} (2 - a)}{v (- 4 a + a^{2} + 13 - 6 b + b^{2})} = 5$

Step 2

Find the LCD of the terms in the equation.

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Step 2.1

Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.

$v (- 4 a + a^{2} + 13 - 6 b + b^{2}), 1$

Step 2.2

The LCM of one and any expression is the expression.

$v (- 4 a + a^{2} + 13 - 6 b + b^{2})$

Step 3

Multiply each term in $\frac{\sqrt{74} (2 - a)}{v (- 4 a + a^{2} + 13 - 6 b + b^{2})} = 5$ by $v (- 4 a + a^{2} + 13 - 6 b + b^{2})$ to eliminate the fractions.

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Step 3.1

Multiply each term in $\frac{\sqrt{74} (2 - a)}{v (- 4 a + a^{2} + 13 - 6 b + b^{2})} = 5$ by $v (- 4 a + a^{2} + 13 - 6 b + b^{2})$ .

$\frac{\sqrt{74} (2 - a)}{v (- 4 a + a^{2} + 13 - 6 b + b^{2})} (v (- 4 a + a^{2} + 13 - 6 b + b^{2})) = 5 (v (- 4 a + a^{2} + 13 - 6 b + b^{2}))$

Step 3.2

Simplify the left side.

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Step 3.2.1

Cancel the common factor of $v (- 4 a + a^{2} + 13 - 6 b + b^{2})$ .

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Step 3.2.1.1

Cancel the common factor.

$\frac{\sqrt{74} (2 - a)}{v (- 4 a + a^{2} + 13 - 6 b + b^{2})} (v (- 4 a + a^{2} + 13 - 6 b + b^{2})) = 5 (v (- 4 a + a^{2} + 13 - 6 b + b^{2}))$

Step 3.2.1.2

Rewrite the expression.

$\sqrt{74} (2 - a) = 5 (v (- 4 a + a^{2} + 13 - 6 b + b^{2}))$

Step 3.2.2

Apply the distributive property.

$\sqrt{74} \cdot 2 + \sqrt{74} (- a) = 5 (v (- 4 a + a^{2} + 13 - 6 b + b^{2}))$

Step 3.2.3

Move $2$ to the left of $\sqrt{74}$ .

$2 \sqrt{74} + \sqrt{74} (- a) = 5 (v (- 4 a + a^{2} + 13 - 6 b + b^{2}))$

Step 3.3

Simplify the right side.

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Step 3.3.1

Apply the distributive property.

$2 \sqrt{74} + \sqrt{74} (- a) = 5 (v (- 4 a) + v a^{2} + v \cdot 13 + v (- 6 b) + v b^{2})$

Step 3.3.2

Simplify.

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Step 3.3.2.1

Rewrite using the commutative property of multiplication.

$2 \sqrt{74} + \sqrt{74} (- a) = 5 (- 4 v a + v a^{2} + v \cdot 13 + v (- 6 b) + v b^{2})$

Step 3.3.2.2

Move $13$ to the left of $v$ .

$2 \sqrt{74} + \sqrt{74} (- a) = 5 (- 4 v a + v a^{2} + 13 \cdot v + v (- 6 b) + v b^{2})$

Step 3.3.2.3

Rewrite using the commutative property of multiplication.

$2 \sqrt{74} + \sqrt{74} (- a) = 5 (- 4 v a + v a^{2} + 13 \cdot v - 6 v b + v b^{2})$

Step 3.3.3

Apply the distributive property.

$2 \sqrt{74} + \sqrt{74} (- a) = 5 (- 4 v a) + 5 (v a^{2}) + 5 (13 v) + 5 (- 6 v b) + 5 (v b^{2})$

Step 3.3.4

Simplify.

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Step 3.3.4.1

Multiply $- 4$ by $5$ .

$2 \sqrt{74} + \sqrt{74} (- a) = - 20 (v a) + 5 (v a^{2}) + 5 (13 v) + 5 (- 6 v b) + 5 (v b^{2})$

Step 3.3.4.2

Multiply $13$ by $5$ .

$2 \sqrt{74} + \sqrt{74} (- a) = - 20 (v a) + 5 v a^{2} + 65 v + 5 (- 6 v b) + 5 (v b^{2})$

Step 3.3.4.3

Multiply $- 6$ by $5$ .

$2 \sqrt{74} + \sqrt{74} (- a) = - 20 (v a) + 5 v a^{2} + 65 v - 30 (v b) + 5 v b^{2}$

Step 3.3.5

Remove parentheses.

$2 \sqrt{74} + \sqrt{74} (- a) = - 20 v a + 5 v a^{2} + 65 v - 30 v b + 5 v b^{2}$

Step 4

Solve the equation.

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Step 4.1

Since $a$ is on the right side of the equation, switch the sides so it is on the left side of the equation.

$- 20 v a + 5 v a^{2} + 65 v - 30 v b + 5 v b^{2} = 2 \sqrt{74} + \sqrt{74} (- a)$

Step 4.2

Move all terms containing $a$ to the left side of the equation.

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Step 4.2.1

Subtract $\sqrt{74} (- a)$ from both sides of the equation.

$- 20 v a + 5 v a^{2} + 65 v - 30 v b + 5 v b^{2} - \sqrt{74} (- a) = 2 \sqrt{74}$

Step 4.2.2

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

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Step 4.2.2.1

Multiply $- 1$ by $- 1$ .

$- 20 v a + 5 v a^{2} + 65 v - 30 v b + 5 v b^{2} + 1 \sqrt{74} a = 2 \sqrt{74}$

Step 4.2.2.2

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

$- 20 v a + 5 v a^{2} + 65 v - 30 v b + 5 v b^{2} + \sqrt{74} a = 2 \sqrt{74}$

Step 4.3

Subtract $2 \sqrt{74}$ from both sides of the equation.

$- 20 v a + 5 v a^{2} + 65 v - 30 v b + 5 v b^{2} + \sqrt{74} a - 2 \sqrt{74} = 0$

Step 4.4

Use the quadratic formula to find the solutions.

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

Step 4.5

Substitute the values $a = 5 v$ , $b = - 20 v + \sqrt{74}$ , and $c = 65 v - 30 v b + 5 v b^{2} - 2 \sqrt{74}$ into the quadratic formula and solve for $a$ .

$\frac{- (- 20 v + \sqrt{74}) \pm \sqrt{{(- 20 v + \sqrt{74})}^{2} - 4 \cdot (5 v \cdot (65 v - 30 v b + 5 v b^{2} - 2 \sqrt{74}))}}{2 (5 v)}$

Step 4.6

Simplify.

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Step 4.6.1

Simplify the numerator.

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Step 4.6.1.1

Apply the distributive property.

$a = \frac{- (- 20 v) - \sqrt{74} \pm \sqrt{{(- 20 v + \sqrt{74})}^{2} - 4 \cdot (5 v) \cdot (65 v - 30 v b + 5 v b^{2} - 2 \sqrt{74})}}{2 \cdot (5 v)}$

Step 4.6.1.2

Multiply $- 20$ by $- 1$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{{(- 20 v + \sqrt{74})}^{2} - 4 \cdot (5 v) \cdot (65 v - 30 v b + 5 v b^{2} - 2 \sqrt{74})}}{2 \cdot (5 v)}$

Step 4.6.1.3

Add parentheses.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{{(- 20 v + \sqrt{74})}^{2} - 4 \cdot (5 (v \cdot (65 v - 30 (v b) + 5 (v b^{2}) - 2 \sqrt{74})))}}{2 \cdot (5 v)}$

Step 4.6.1.4

Let $u = 5 (v \cdot (65 v - 30 (v b) + 5 (v b^{2}) - 2 \sqrt{74}))$ . Substitute $u$ for all occurrences of $5 (v \cdot (65 v - 30 (v b) + 5 (v b^{2}) - 2 \sqrt{74}))$ .

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Step 4.6.1.4.1

Rewrite ${(- 20 v + \sqrt{74})}^{2}$ as $(- 20 v + \sqrt{74}) (- 20 v + \sqrt{74})$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{(- 20 v + \sqrt{74}) (- 20 v + \sqrt{74}) - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.2

Expand $(- 20 v + \sqrt{74}) (- 20 v + \sqrt{74})$ using the FOIL Method.

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Step 4.6.1.4.2.1

Apply the distributive property.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{- 20 v (- 20 v + \sqrt{74}) + \sqrt{74} (- 20 v + \sqrt{74}) - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.2.2

Apply the distributive property.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{- 20 v (- 20 v) - 20 v \sqrt{74} + \sqrt{74} (- 20 v + \sqrt{74}) - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.2.3

Apply the distributive property.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{- 20 v (- 20 v) - 20 v \sqrt{74} + \sqrt{74} (- 20 v) + \sqrt{74} \sqrt{74} - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3

Simplify and combine like terms.

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Step 4.6.1.4.3.1

Simplify each term.

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Step 4.6.1.4.3.1.1

Rewrite using the commutative property of multiplication.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{- 20 \cdot (- 20 v \cdot v) - 20 v \sqrt{74} + \sqrt{74} (- 20 v) + \sqrt{74} \sqrt{74} - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3.1.2

Multiply $v$ by $v$ by adding the exponents.

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Step 4.6.1.4.3.1.2.1

Move $v$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{- 20 \cdot (- 20 (v \cdot v)) - 20 v \sqrt{74} + \sqrt{74} (- 20 v) + \sqrt{74} \sqrt{74} - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3.1.2.2

Multiply $v$ by $v$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{- 20 \cdot (- 20 v^{2}) - 20 v \sqrt{74} + \sqrt{74} (- 20 v) + \sqrt{74} \sqrt{74} - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3.1.3

Multiply $- 20$ by $- 20$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{400 v^{2} - 20 v \sqrt{74} + \sqrt{74} (- 20 v) + \sqrt{74} \sqrt{74} - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3.1.4

Combine using the product rule for radicals.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{400 v^{2} - 20 v \sqrt{74} + \sqrt{74} (- 20 v) + \sqrt{74 \cdot 74} - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3.1.5

Multiply $74$ by $74$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{400 v^{2} - 20 v \sqrt{74} + \sqrt{74} (- 20 v) + \sqrt{5476} - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3.1.6

Rewrite $5476$ as $74^{2}$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{400 v^{2} - 20 v \sqrt{74} + \sqrt{74} (- 20 v) + \sqrt{74^{2}} - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3.1.7

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

$a = \frac{20 v - \sqrt{74} \pm \sqrt{400 v^{2} - 20 v \sqrt{74} + \sqrt{74} (- 20 v) + 74 - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3.2

Reorder the factors of $\sqrt{74} (- 20 v)$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{400 v^{2} - 20 v \sqrt{74} - 20 v \sqrt{74} + 74 - 4 \cdot u}}{2 \cdot (5 v)}$

Step 4.6.1.4.3.3

Subtract $20 v \sqrt{74}$ from $- 20 v \sqrt{74}$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{400 v^{2} - 40 v \sqrt{74} + 74 - 4 \cdot u}}{2 \cdot (5 v)}$

$a = \frac{20 v - \sqrt{74} \pm \sqrt{400 v^{2} - 40 v \sqrt{74} + 74 - 4 u}}{2 \cdot (5 v)}$

Step 4.6.1.5

Factor $2$ out of $400 v^{2} - 40 v \sqrt{74} + 74 - 4 u$ .

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Step 4.6.1.5.1

Factor $2$ out of $400 v^{2}$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2}) - 40 v \sqrt{74} + 74 - 4 u}}{2 \cdot (5 v)}$

Step 4.6.1.5.2

Factor $2$ out of $- 40 v \sqrt{74}$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2}) + 2 (- 20 v \sqrt{74}) + 74 - 4 u}}{2 \cdot (5 v)}$

Step 4.6.1.5.3

Factor $2$ out of $74$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2}) + 2 (- 20 v \sqrt{74}) + 2 (37) - 4 u}}{2 \cdot (5 v)}$

Step 4.6.1.5.4

Factor $2$ out of $- 4 u$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2}) + 2 (- 20 v \sqrt{74}) + 2 (37) + 2 (- 2 u)}}{2 \cdot (5 v)}$

Step 4.6.1.5.5

Factor $2$ out of $2 (200 v^{2}) + 2 (- 20 v \sqrt{74})$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74}) + 2 (37) + 2 (- 2 u)}}{2 \cdot (5 v)}$

Step 4.6.1.5.6

Factor $2$ out of $2 (200 v^{2} - 20 v \sqrt{74}) + 2 (37)$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37) + 2 (- 2 u)}}{2 \cdot (5 v)}$

Step 4.6.1.5.7

Factor $2$ out of $2 (200 v^{2} - 20 v \sqrt{74} + 37) + 2 (- 2 u)$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 u)}}{2 \cdot (5 v)}$

Step 4.6.1.6

Replace all occurrences of $u$ with $5 (v \cdot (65 v - 30 (v b) + 5 (v b^{2}) - 2 \sqrt{74}))$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (v \cdot (65 v - 30 (v b) + 5 (v b^{2}) - 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7

Simplify.

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Step 4.6.1.7.1

Simplify each term.

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Step 4.6.1.7.1.1

Remove parentheses.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (v \cdot (65 v - 30 v b + 5 v b^{2} - 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.2

Apply the distributive property.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (v (65 v) + v (- 30 v b) + v (5 v b^{2}) + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.3

Simplify.

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Step 4.6.1.7.1.3.1

Rewrite using the commutative property of multiplication.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 v \cdot v + v (- 30 v b) + v (5 v b^{2}) + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.3.2

Rewrite using the commutative property of multiplication.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 v \cdot v - 30 v (v b) + v (5 v b^{2}) + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.3.3

Rewrite using the commutative property of multiplication.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 v \cdot v - 30 v (v b) + 5 v (v b^{2}) + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.4

Simplify each term.

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Step 4.6.1.7.1.4.1

Multiply $v$ by $v$ by adding the exponents.

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Step 4.6.1.7.1.4.1.1

Move $v$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 (v \cdot v) - 30 v (v b) + 5 v (v b^{2}) + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.4.1.2

Multiply $v$ by $v$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 v^{2} - 30 v (v b) + 5 v (v b^{2}) + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.4.2

Multiply $v$ by $v$ by adding the exponents.

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Step 4.6.1.7.1.4.2.1

Move $v$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 v^{2} - 30 (v \cdot v) b + 5 v (v b^{2}) + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.4.2.2

Multiply $v$ by $v$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 v^{2} - 30 v^{2} b + 5 v (v b^{2}) + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.4.3

Multiply $v$ by $v$ by adding the exponents.

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Step 4.6.1.7.1.4.3.1

Move $v$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 v^{2} - 30 v^{2} b + 5 (v \cdot v) b^{2} + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.4.3.2

Multiply $v$ by $v$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 v^{2} - 30 v^{2} b + 5 v^{2} b^{2} + v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.5

Apply the distributive property.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (5 (65 v^{2}) + 5 (- 30 v^{2} b) + 5 (5 v^{2} b^{2}) + 5 (v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.6

Simplify.

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Step 4.6.1.7.1.6.1

Multiply $65$ by $5$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (325 v^{2} + 5 (- 30 v^{2} b) + 5 (5 v^{2} b^{2}) + 5 (v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.6.2

Multiply $- 30$ by $5$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (325 v^{2} - 150 (v^{2} b) + 5 (5 v^{2} b^{2}) + 5 (v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.6.3

Multiply $5$ by $5$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (325 v^{2} - 150 (v^{2} b) + 25 (v^{2} b^{2}) + 5 (v (- 2 \sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.6.4

Multiply $- 2$ by $5$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (325 v^{2} - 150 (v^{2} b) + 25 (v^{2} b^{2}) - 10 (v (\sqrt{74}))))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.7

Remove parentheses.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (325 v^{2} - 150 v^{2} b + 25 v^{2} b^{2} - 10 v \sqrt{74}))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.8

Apply the distributive property.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 2 (325 v^{2}) - 2 (- 150 v^{2} b) - 2 (25 v^{2} b^{2}) - 2 (- 10 v \sqrt{74}))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.9

Simplify.

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Step 4.6.1.7.1.9.1

Multiply $325$ by $- 2$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 650 v^{2} - 2 (- 150 v^{2} b) - 2 (25 v^{2} b^{2}) - 2 (- 10 v \sqrt{74}))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.9.2

Multiply $- 150$ by $- 2$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 650 v^{2} + 300 (v^{2} b) - 2 (25 v^{2} b^{2}) - 2 (- 10 v \sqrt{74}))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.9.3

Multiply $25$ by $- 2$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 650 v^{2} + 300 (v^{2} b) - 50 (v^{2} b^{2}) - 2 (- 10 v \sqrt{74}))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.9.4

Multiply $- 10$ by $- 2$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 650 v^{2} + 300 (v^{2} b) - 50 (v^{2} b^{2}) + 20 (v \sqrt{74}))}}{2 \cdot (5 v)}$

Step 4.6.1.7.1.10

Remove parentheses.

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} - 20 v \sqrt{74} + 37 - 650 v^{2} + 300 v^{2} b - 50 v^{2} b^{2} + 20 v \sqrt{74})}}{2 \cdot (5 v)}$

Step 4.6.1.7.2

Combine the opposite terms in $200 v^{2} - 20 v \sqrt{74} + 37 - 650 v^{2} + 300 v^{2} b - 50 v^{2} b^{2} + 20 v \sqrt{74}$ .

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Step 4.6.1.7.2.1

Add $- 20 v \sqrt{74}$ and $20 v \sqrt{74}$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} + 37 - 650 v^{2} + 300 v^{2} b - 50 v^{2} b^{2} + 0)}}{2 \cdot (5 v)}$

Step 4.6.1.7.2.2

Add $200 v^{2} + 37 - 650 v^{2} + 300 v^{2} b - 50 v^{2} b^{2}$ and $0$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (200 v^{2} + 37 - 650 v^{2} + 300 v^{2} b - 50 v^{2} b^{2})}}{2 \cdot (5 v)}$

Step 4.6.1.7.3

Subtract $650 v^{2}$ from $200 v^{2}$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (- 450 v^{2} + 37 + 300 v^{2} b - 50 v^{2} b^{2})}}{2 \cdot (5 v)}$

Step 4.6.2

Multiply $2$ by $5$ .

$a = \frac{20 v - \sqrt{74} \pm \sqrt{2 (- 450 v^{2} + 37 + 300 v^{2} b - 50 v^{2} b^{2})}}{10 v}$

Step 4.7

The final answer is the combination of both solutions.

$a = \frac{20 v - \sqrt{74} + \sqrt{2 (- 450 v^{2} + 37 + 300 v^{2} b - 50 v^{2} b^{2})}}{10 v}$

$a = \frac{20 v - \sqrt{74} - \sqrt{2 (- 450 v^{2} + 37 + 300 v^{2} b - 50 v^{2} b^{2})}}{10 v}$

$a = \frac{20 v - \sqrt{74} + \sqrt{2 (- 450 v^{2} + 37 + 300 v^{2} b - 50 v^{2} b^{2})}}{10 v}$

$a = \frac{20 v - \sqrt{74} - \sqrt{2 (- 450 v^{2} + 37 + 300 v^{2} b - 50 v^{2} b^{2})}}{10 v}$