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Simplifying (x + 2)(x + -1) = 28 Reorder the terms: (2 + x)(x + -1) = 28 Reorder the terms: (2 + x)(-1 + x) = 28 Multiply (2 + x) * (-1 + x) (2(-1 + x) + x(-1 + x)) = 28 ((-1 * 2 + x * 2) + x(-1 + x)) = 28 ((-2 + 2x) + x(-1 + x)) = 28 (-2 + 2x + (-1 * x + x * x)) = 28 (-2 + 2x + (-1x + x2)) = 28 Combine like terms: 2x + -1x = 1x (-2 + 1x + x2) = 28 Solving -2 + 1x + x2 = 28 Solving for variable 'x'. Reorder the terms: -2 + -28 + 1x + x2 = 28 + -28 Combine like terms: -2 + -28 = -30 -30 + 1x + x2 = 28 + -28 Combine like terms: 28 + -28 = 0 -30 + 1x + x2 = 0 Factor a trinomial. (-6 + -1x)(5 + -1x) = 0Subproblem 1
Set the factor '(-6 + -1x)' equal to zero and attempt to solve: Simplifying -6 + -1x = 0 Solving -6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = 0 + 6 -1x = 0 + 6 Combine like terms: 0 + 6 = 6 -1x = 6 Divide each side by '-1'. x = -6 Simplifying x = -6Subproblem 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 = {-6, 5}
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