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Simplifying 5x(2x + -1) = 15 Reorder the terms: 5x(-1 + 2x) = 15 (-1 * 5x + 2x * 5x) = 15 (-5x + 10x2) = 15 Solving -5x + 10x2 = 15 Solving for variable 'x'. Reorder the terms: -15 + -5x + 10x2 = 15 + -15 Combine like terms: 15 + -15 = 0 -15 + -5x + 10x2 = 0 Factor out the Greatest Common Factor (GCF), '5'. 5(-3 + -1x + 2x2) = 0 Factor a trinomial. 5((-1 + -1x)(3 + -2x)) = 0 Ignore the factor 5.Subproblem 1
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 = -1Subproblem 2
Set the factor '(3 + -2x)' equal to zero and attempt to solve: Simplifying 3 + -2x = 0 Solving 3 + -2x = 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 + -2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -2x = 0 + -3 -2x = 0 + -3 Combine like terms: 0 + -3 = -3 -2x = -3 Divide each side by '-2'. x = 1.5 Simplifying x = 1.5Solution
x = {-1, 1.5}
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