(v+7)(v-9)=

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Solution for (v+7)(v-9)= equation:


Simplifying
(v + 7)(v + -9) = 0

Reorder the terms:
(7 + v)(v + -9) = 0

Reorder the terms:
(7 + v)(-9 + v) = 0

Multiply (7 + v) * (-9 + v)
(7(-9 + v) + v(-9 + v)) = 0
((-9 * 7 + v * 7) + v(-9 + v)) = 0
((-63 + 7v) + v(-9 + v)) = 0
(-63 + 7v + (-9 * v + v * v)) = 0
(-63 + 7v + (-9v + v2)) = 0

Combine like terms: 7v + -9v = -2v
(-63 + -2v + v2) = 0

Solving
-63 + -2v + v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(-7 + -1v)(9 + -1v) = 0

Subproblem 1

Set the factor '(-7 + -1v)' equal to zero and attempt to solve: Simplifying -7 + -1v = 0 Solving -7 + -1v = 0 Move all terms containing v to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1v = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1v = 0 + 7 -1v = 0 + 7 Combine like terms: 0 + 7 = 7 -1v = 7 Divide each side by '-1'. v = -7 Simplifying v = -7

Subproblem 2

Set the factor '(9 + -1v)' equal to zero and attempt to solve: Simplifying 9 + -1v = 0 Solving 9 + -1v = 0 Move all terms containing v to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1v = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1v = 0 + -9 -1v = 0 + -9 Combine like terms: 0 + -9 = -9 -1v = -9 Divide each side by '-1'. v = 9 Simplifying v = 9

Solution

v = {-7, 9}

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