v*v=18-7v

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Solution for v*v=18-7v equation:


Simplifying
v * v = 18 + -7v

Multiply v * v
v2 = 18 + -7v

Solving
v2 = 18 + -7v

Solving for variable 'v'.

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

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

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

Combine like terms: -7v + 7v = 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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