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Simplifying 5x(x + 2) = 120 Reorder the terms: 5x(2 + x) = 120 (2 * 5x + x * 5x) = 120 (10x + 5x2) = 120 Solving 10x + 5x2 = 120 Solving for variable 'x'. Reorder the terms: -120 + 10x + 5x2 = 120 + -120 Combine like terms: 120 + -120 = 0 -120 + 10x + 5x2 = 0 Factor out the Greatest Common Factor (GCF), '5'. 5(-24 + 2x + x2) = 0 Factor a trinomial. 5((-6 + -1x)(4 + -1x)) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(-6 + -1x)' equal to zero and attempt to solve: Simplifying -6 + -1x = 0 Solving -6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = 0 + 6 -1x = 0 + 6 Combine like terms: 0 + 6 = 6 -1x = 6 Divide each side by '-1'. x = -6 Simplifying x = -6Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4Solution
x = {-6, 4}
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