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Simplifying 3(x + 2)(x + -2) = 3(7x + 8) + -12 Reorder the terms: 3(2 + x)(x + -2) = 3(7x + 8) + -12 Reorder the terms: 3(2 + x)(-2 + x) = 3(7x + 8) + -12 Multiply (2 + x) * (-2 + x) 3(2(-2 + x) + x(-2 + x)) = 3(7x + 8) + -12 3((-2 * 2 + x * 2) + x(-2 + x)) = 3(7x + 8) + -12 3((-4 + 2x) + x(-2 + x)) = 3(7x + 8) + -12 3(-4 + 2x + (-2 * x + x * x)) = 3(7x + 8) + -12 3(-4 + 2x + (-2x + x2)) = 3(7x + 8) + -12 Combine like terms: 2x + -2x = 0 3(-4 + 0 + x2) = 3(7x + 8) + -12 3(-4 + x2) = 3(7x + 8) + -12 (-4 * 3 + x2 * 3) = 3(7x + 8) + -12 (-12 + 3x2) = 3(7x + 8) + -12 Reorder the terms: -12 + 3x2 = 3(8 + 7x) + -12 -12 + 3x2 = (8 * 3 + 7x * 3) + -12 -12 + 3x2 = (24 + 21x) + -12 Reorder the terms: -12 + 3x2 = 24 + -12 + 21x Combine like terms: 24 + -12 = 12 -12 + 3x2 = 12 + 21x Solving -12 + 3x2 = 12 + 21x Solving for variable 'x'. Reorder the terms: -12 + -12 + -21x + 3x2 = 12 + 21x + -12 + -21x Combine like terms: -12 + -12 = -24 -24 + -21x + 3x2 = 12 + 21x + -12 + -21x Reorder the terms: -24 + -21x + 3x2 = 12 + -12 + 21x + -21x Combine like terms: 12 + -12 = 0 -24 + -21x + 3x2 = 0 + 21x + -21x -24 + -21x + 3x2 = 21x + -21x Combine like terms: 21x + -21x = 0 -24 + -21x + 3x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(-8 + -7x + x2) = 0 Factor a trinomial. 3((-1 + -1x)(8 + -1x)) = 0 Ignore the factor 3.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 '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8Solution
x = {-1, 8}
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