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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 = -2Subproblem 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 = 1Solution
x = {-2, 1}
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