9x^2-8=-x

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


Simplifying
9x2 + -8 = -1x

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

Solving
-8 + 9x2 = -1x

Solving for variable 'x'.

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

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

Factor a trinomial.
(-1 + -1x)(8 + -9x) = 0

Subproblem 1

Set the factor '(-1 + -1x)' equal to zero and attempt to solve: Simplifying -1 + -1x = 0 Solving -1 + -1x = 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 + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x = 0 + 1 -1x = 0 + 1 Combine like terms: 0 + 1 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1

Subproblem 2

Set the factor '(8 + -9x)' equal to zero and attempt to solve: Simplifying 8 + -9x = 0 Solving 8 + -9x = 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 + -9x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -9x = 0 + -8 -9x = 0 + -8 Combine like terms: 0 + -8 = -8 -9x = -8 Divide each side by '-9'. x = 0.8888888889 Simplifying x = 0.8888888889

Solution

x = {-1, 0.8888888889}

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