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Simplifying (x + 3)(x + -4) + -8 = 0 Reorder the terms: (3 + x)(x + -4) + -8 = 0 Reorder the terms: (3 + x)(-4 + x) + -8 = 0 Multiply (3 + x) * (-4 + x) (3(-4 + x) + x(-4 + x)) + -8 = 0 ((-4 * 3 + x * 3) + x(-4 + x)) + -8 = 0 ((-12 + 3x) + x(-4 + x)) + -8 = 0 (-12 + 3x + (-4 * x + x * x)) + -8 = 0 (-12 + 3x + (-4x + x2)) + -8 = 0 Combine like terms: 3x + -4x = -1x (-12 + -1x + x2) + -8 = 0 Reorder the terms: -12 + -8 + -1x + x2 = 0 Combine like terms: -12 + -8 = -20 -20 + -1x + x2 = 0 Solving -20 + -1x + x2 = 0 Solving for variable 'x'. Factor a trinomial. (-4 + -1x)(5 + -1x) = 0Subproblem 1
Set the factor '(-4 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4Subproblem 2
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 = 5Solution
x = {-4, 5}
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