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Simplifying 2x(x + -12) = 90 Reorder the terms: 2x(-12 + x) = 90 (-12 * 2x + x * 2x) = 90 (-24x + 2x2) = 90 Solving -24x + 2x2 = 90 Solving for variable 'x'. Reorder the terms: -90 + -24x + 2x2 = 90 + -90 Combine like terms: 90 + -90 = 0 -90 + -24x + 2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-45 + -12x + x2) = 0 Factor a trinomial. 2((-3 + -1x)(15 + -1x)) = 0 Ignore the factor 2.Subproblem 1
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 = -3Subproblem 2
Set the factor '(15 + -1x)' equal to zero and attempt to solve: Simplifying 15 + -1x = 0 Solving 15 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -1x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -1x = 0 + -15 -1x = 0 + -15 Combine like terms: 0 + -15 = -15 -1x = -15 Divide each side by '-1'. x = 15 Simplifying x = 15Solution
x = {-3, 15}
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