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Simplifying (x + -3) * 2 = (x + 1)(x + -1) + -20 Reorder the terms: (-3 + x) * 2 = (x + 1)(x + -1) + -20 Reorder the terms for easier multiplication: 2(-3 + x) = (x + 1)(x + -1) + -20 (-3 * 2 + x * 2) = (x + 1)(x + -1) + -20 (-6 + 2x) = (x + 1)(x + -1) + -20 Reorder the terms: -6 + 2x = (1 + x)(x + -1) + -20 Reorder the terms: -6 + 2x = (1 + x)(-1 + x) + -20 Multiply (1 + x) * (-1 + x) -6 + 2x = (1(-1 + x) + x(-1 + x)) + -20 -6 + 2x = ((-1 * 1 + x * 1) + x(-1 + x)) + -20 -6 + 2x = ((-1 + 1x) + x(-1 + x)) + -20 -6 + 2x = (-1 + 1x + (-1 * x + x * x)) + -20 -6 + 2x = (-1 + 1x + (-1x + x2)) + -20 Combine like terms: 1x + -1x = 0 -6 + 2x = (-1 + 0 + x2) + -20 -6 + 2x = (-1 + x2) + -20 Reorder the terms: -6 + 2x = -1 + -20 + x2 Combine like terms: -1 + -20 = -21 -6 + 2x = -21 + x2 Solving -6 + 2x = -21 + x2 Solving for variable 'x'. Reorder the terms: -6 + 21 + 2x + -1x2 = -21 + x2 + 21 + -1x2 Combine like terms: -6 + 21 = 15 15 + 2x + -1x2 = -21 + x2 + 21 + -1x2 Reorder the terms: 15 + 2x + -1x2 = -21 + 21 + x2 + -1x2 Combine like terms: -21 + 21 = 0 15 + 2x + -1x2 = 0 + x2 + -1x2 15 + 2x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 15 + 2x + -1x2 = 0 Factor a trinomial. (5 + -1x)(3 + x) = 0Subproblem 1
Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5Subproblem 2
Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 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 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3Solution
x = {5, -3}
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