-8=x^2+9x

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Solution for -8=x^2+9x equation:


Simplifying
-8 = x2 + 9x

Reorder the terms:
-8 = 9x + x2

Solving
-8 = 9x + x2

Solving for variable 'x'.

Reorder the terms:
-8 + -9x + -1x2 = 9x + -9x + x2 + -1x2

Combine like terms: 9x + -9x = 0
-8 + -9x + -1x2 = 0 + x2 + -1x2
-8 + -9x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-8 + -9x + -1x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(8 + 9x + x2) = 0

Factor a trinomial.
-1((8 + x)(1 + x)) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(8 + x)' equal to zero and attempt to solve: Simplifying 8 + x = 0 Solving 8 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + x = 0 + -8 x = 0 + -8 Combine like terms: 0 + -8 = -8 x = -8 Simplifying x = -8

Subproblem 2

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

Solution

x = {-8, -1}

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