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Simplifying (x + -2)(x + 7) + 20 = 0 Reorder the terms: (-2 + x)(x + 7) + 20 = 0 Reorder the terms: (-2 + x)(7 + x) + 20 = 0 Multiply (-2 + x) * (7 + x) (-2(7 + x) + x(7 + x)) + 20 = 0 ((7 * -2 + x * -2) + x(7 + x)) + 20 = 0 ((-14 + -2x) + x(7 + x)) + 20 = 0 (-14 + -2x + (7 * x + x * x)) + 20 = 0 (-14 + -2x + (7x + x2)) + 20 = 0 Combine like terms: -2x + 7x = 5x (-14 + 5x + x2) + 20 = 0 Reorder the terms: -14 + 20 + 5x + x2 = 0 Combine like terms: -14 + 20 = 6 6 + 5x + x2 = 0 Solving 6 + 5x + x2 = 0 Solving for variable 'x'. Factor a trinomial. (3 + x)(2 + x) = 0Subproblem 1
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 = -3Subproblem 2
Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2Solution
x = {-3, -2}
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