v(v+7)=18

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Solution for v(v+7)=18 equation:


Simplifying
v(v + 7) = 18

Reorder the terms:
v(7 + v) = 18
(7 * v + v * v) = 18
(7v + v2) = 18

Solving
7v + v2 = 18

Solving for variable 'v'.

Reorder the terms:
-18 + 7v + v2 = 18 + -18

Combine like terms: 18 + -18 = 0
-18 + 7v + v2 = 0

Factor a trinomial.
(-9 + -1v)(2 + -1v) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(2 + -1v)' equal to zero and attempt to solve: Simplifying 2 + -1v = 0 Solving 2 + -1v = 0 Move all terms containing v to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1v = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1v = 0 + -2 -1v = 0 + -2 Combine like terms: 0 + -2 = -2 -1v = -2 Divide each side by '-1'. v = 2 Simplifying v = 2

Solution

v = {-9, 2}

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