85=x(x+-12)

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Solution for 85=x(x+-12) equation:


Simplifying
85 = x(x + -12)

Reorder the terms:
85 = x(-12 + x)
85 = (-12 * x + x * x)
85 = (-12x + x2)

Solving
85 = -12x + x2

Solving for variable 'x'.

Reorder the terms:
85 + 12x + -1x2 = -12x + 12x + x2 + -1x2

Combine like terms: -12x + 12x = 0
85 + 12x + -1x2 = 0 + x2 + -1x2
85 + 12x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
85 + 12x + -1x2 = 0

Factor a trinomial.
(17 + -1x)(5 + x) = 0

Subproblem 1

Set the factor '(17 + -1x)' equal to zero and attempt to solve: Simplifying 17 + -1x = 0 Solving 17 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-17' to each side of the equation. 17 + -17 + -1x = 0 + -17 Combine like terms: 17 + -17 = 0 0 + -1x = 0 + -17 -1x = 0 + -17 Combine like terms: 0 + -17 = -17 -1x = -17 Divide each side by '-1'. x = 17 Simplifying x = 17

Subproblem 2

Set the factor '(5 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Simplifying x = -5

Solution

x = {17, -5}

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