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Simplifying (2x + 10)(x) = 168 Reorder the terms: (10 + 2x)(x) = 168 Reorder the terms for easier multiplication: x(10 + 2x) = 168 (10 * x + 2x * x) = 168 (10x + 2x2) = 168 Solving 10x + 2x2 = 168 Solving for variable 'x'. Reorder the terms: -168 + 10x + 2x2 = 168 + -168 Combine like terms: 168 + -168 = 0 -168 + 10x + 2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-84 + 5x + x2) = 0 Factor a trinomial. 2((-12 + -1x)(7 + -1x)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-12 + -1x)' equal to zero and attempt to solve: Simplifying -12 + -1x = 0 Solving -12 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + -1x = 0 + 12 Combine like terms: -12 + 12 = 0 0 + -1x = 0 + 12 -1x = 0 + 12 Combine like terms: 0 + 12 = 12 -1x = 12 Divide each side by '-1'. x = -12 Simplifying x = -12Subproblem 2
Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7Solution
x = {-12, 7}
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