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Simplifying 0 = (x + 1)(2x + -4) Reorder the terms: 0 = (1 + x)(2x + -4) Reorder the terms: 0 = (1 + x)(-4 + 2x) Multiply (1 + x) * (-4 + 2x) 0 = (1(-4 + 2x) + x(-4 + 2x)) 0 = ((-4 * 1 + 2x * 1) + x(-4 + 2x)) 0 = ((-4 + 2x) + x(-4 + 2x)) 0 = (-4 + 2x + (-4 * x + 2x * x)) 0 = (-4 + 2x + (-4x + 2x2)) Combine like terms: 2x + -4x = -2x 0 = (-4 + -2x + 2x2) Solving 0 = -4 + -2x + 2x2 Solving for variable 'x'. Combine like terms: 0 + 4 = 4 4 + 2x + -2x2 = -4 + -2x + 2x2 + 4 + 2x + -2x2 Reorder the terms: 4 + 2x + -2x2 = -4 + 4 + -2x + 2x + 2x2 + -2x2 Combine like terms: -4 + 4 = 0 4 + 2x + -2x2 = 0 + -2x + 2x + 2x2 + -2x2 4 + 2x + -2x2 = -2x + 2x + 2x2 + -2x2 Combine like terms: -2x + 2x = 0 4 + 2x + -2x2 = 0 + 2x2 + -2x2 4 + 2x + -2x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 4 + 2x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(2 + x + -1x2) = 0 Factor a trinomial. 2((2 + -1x)(1 + x)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 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 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2Subproblem 2
Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1Solution
x = {2, -1}
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