x^2+13x-40=8

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Solution for x^2+13x-40=8 equation:


Simplifying
x2 + 13x + -40 = 8

Reorder the terms:
-40 + 13x + x2 = 8

Solving
-40 + 13x + x2 = 8

Solving for variable 'x'.

Reorder the terms:
-40 + -8 + 13x + x2 = 8 + -8

Combine like terms: -40 + -8 = -48
-48 + 13x + x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-48 + 13x + x2 = 0

Factor a trinomial.
(-16 + -1x)(3 + -1x) = 0

Subproblem 1

Set the factor '(-16 + -1x)' equal to zero and attempt to solve: Simplifying -16 + -1x = 0 Solving -16 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + -1x = 0 + 16 Combine like terms: -16 + 16 = 0 0 + -1x = 0 + 16 -1x = 0 + 16 Combine like terms: 0 + 16 = 16 -1x = 16 Divide each side by '-1'. x = -16 Simplifying x = -16

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-16, 3}

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