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Simplifying (x + 1)(x + 2) = 90 Reorder the terms: (1 + x)(x + 2) = 90 Reorder the terms: (1 + x)(2 + x) = 90 Multiply (1 + x) * (2 + x) (1(2 + x) + x(2 + x)) = 90 ((2 * 1 + x * 1) + x(2 + x)) = 90 ((2 + 1x) + x(2 + x)) = 90 (2 + 1x + (2 * x + x * x)) = 90 (2 + 1x + (2x + x2)) = 90 Combine like terms: 1x + 2x = 3x (2 + 3x + x2) = 90 Solving 2 + 3x + x2 = 90 Solving for variable 'x'. Reorder the terms: 2 + -90 + 3x + x2 = 90 + -90 Combine like terms: 2 + -90 = -88 -88 + 3x + x2 = 90 + -90 Combine like terms: 90 + -90 = 0 -88 + 3x + x2 = 0 Factor a trinomial. (-11 + -1x)(8 + -1x) = 0Subproblem 1
Set the factor '(-11 + -1x)' equal to zero and attempt to solve: Simplifying -11 + -1x = 0 Solving -11 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + -1x = 0 + 11 Combine like terms: -11 + 11 = 0 0 + -1x = 0 + 11 -1x = 0 + 11 Combine like terms: 0 + 11 = 11 -1x = 11 Divide each side by '-1'. x = -11 Simplifying x = -11Subproblem 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 = {-11, 8}
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