45=v(v-4)

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Solution for 45=v(v-4) equation:


Simplifying
45 = v(v + -4)

Reorder the terms:
45 = v(-4 + v)
45 = (-4 * v + v * v)
45 = (-4v + v2)

Solving
45 = -4v + v2

Solving for variable 'v'.

Reorder the terms:
45 + 4v + -1v2 = -4v + 4v + v2 + -1v2

Combine like terms: -4v + 4v = 0
45 + 4v + -1v2 = 0 + v2 + -1v2
45 + 4v + -1v2 = v2 + -1v2

Combine like terms: v2 + -1v2 = 0
45 + 4v + -1v2 = 0

Factor a trinomial.
(9 + -1v)(5 + v) = 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 '(5 + v)' equal to zero and attempt to solve: Simplifying 5 + v = 0 Solving 5 + v = 0 Move all terms containing v to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + v = 0 + -5 Combine like terms: 5 + -5 = 0 0 + v = 0 + -5 v = 0 + -5 Combine like terms: 0 + -5 = -5 v = -5 Simplifying v = -5

Solution

v = {9, -5}

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