9x^2+9x-18=6x^2+6x-12

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Solution for 9x^2+9x-18=6x^2+6x-12 equation:


Simplifying
9x2 + 9x + -18 = 6x2 + 6x + -12

Reorder the terms:
-18 + 9x + 9x2 = 6x2 + 6x + -12

Reorder the terms:
-18 + 9x + 9x2 = -12 + 6x + 6x2

Solving
-18 + 9x + 9x2 = -12 + 6x + 6x2

Solving for variable 'x'.

Reorder the terms:
-18 + 12 + 9x + -6x + 9x2 + -6x2 = -12 + 6x + 6x2 + 12 + -6x + -6x2

Combine like terms: -18 + 12 = -6
-6 + 9x + -6x + 9x2 + -6x2 = -12 + 6x + 6x2 + 12 + -6x + -6x2

Combine like terms: 9x + -6x = 3x
-6 + 3x + 9x2 + -6x2 = -12 + 6x + 6x2 + 12 + -6x + -6x2

Combine like terms: 9x2 + -6x2 = 3x2
-6 + 3x + 3x2 = -12 + 6x + 6x2 + 12 + -6x + -6x2

Reorder the terms:
-6 + 3x + 3x2 = -12 + 12 + 6x + -6x + 6x2 + -6x2

Combine like terms: -12 + 12 = 0
-6 + 3x + 3x2 = 0 + 6x + -6x + 6x2 + -6x2
-6 + 3x + 3x2 = 6x + -6x + 6x2 + -6x2

Combine like terms: 6x + -6x = 0
-6 + 3x + 3x2 = 0 + 6x2 + -6x2
-6 + 3x + 3x2 = 6x2 + -6x2

Combine like terms: 6x2 + -6x2 = 0
-6 + 3x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-2 + x + x2) = 0

Factor a trinomial.
3((-2 + -1x)(1 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2

Subproblem 2

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

Solution

x = {-2, 1}

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