180=x*x+3x

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Solution for 180=x*x+3x equation:


Simplifying
180 = x * x + 3x

Multiply x * x
180 = x2 + 3x

Reorder the terms:
180 = 3x + x2

Solving
180 = 3x + x2

Solving for variable 'x'.

Reorder the terms:
180 + -3x + -1x2 = 3x + -3x + x2 + -1x2

Combine like terms: 3x + -3x = 0
180 + -3x + -1x2 = 0 + x2 + -1x2
180 + -3x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
180 + -3x + -1x2 = 0

Factor a trinomial.
(12 + -1x)(15 + x) = 0

Subproblem 1

Set the factor '(12 + -1x)' equal to zero and attempt to solve: Simplifying 12 + -1x = 0 Solving 12 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -1x = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -1x = 0 + -12 -1x = 0 + -12 Combine like terms: 0 + -12 = -12 -1x = -12 Divide each side by '-1'. x = 12 Simplifying x = 12

Subproblem 2

Set the factor '(15 + x)' equal to zero and attempt to solve: Simplifying 15 + x = 0 Solving 15 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + x = 0 + -15 x = 0 + -15 Combine like terms: 0 + -15 = -15 x = -15 Simplifying x = -15

Solution

x = {12, -15}

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