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Simplifying -5x2 + 15x + -12 = -2 Reorder the terms: -12 + 15x + -5x2 = -2 Solving -12 + 15x + -5x2 = -2 Solving for variable 'x'. Reorder the terms: -12 + 2 + 15x + -5x2 = -2 + 2 Combine like terms: -12 + 2 = -10 -10 + 15x + -5x2 = -2 + 2 Combine like terms: -2 + 2 = 0 -10 + 15x + -5x2 = 0 Factor out the Greatest Common Factor (GCF), '5'. 5(-2 + 3x + -1x2) = 0 Factor a trinomial. 5((-2 + x)(1 + -1x)) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(-2 + x)' equal to zero and attempt to solve: Simplifying -2 + x = 0 Solving -2 + x = 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 + x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + x = 0 + 2 x = 0 + 2 Combine like terms: 0 + 2 = 2 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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