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Simplifying (2x + 5)(x + 1) = -1 Reorder the terms: (5 + 2x)(x + 1) = -1 Reorder the terms: (5 + 2x)(1 + x) = -1 Multiply (5 + 2x) * (1 + x) (5(1 + x) + 2x * (1 + x)) = -1 ((1 * 5 + x * 5) + 2x * (1 + x)) = -1 ((5 + 5x) + 2x * (1 + x)) = -1 (5 + 5x + (1 * 2x + x * 2x)) = -1 (5 + 5x + (2x + 2x2)) = -1 Combine like terms: 5x + 2x = 7x (5 + 7x + 2x2) = -1 Solving 5 + 7x + 2x2 = -1 Solving for variable 'x'. Reorder the terms: 5 + 1 + 7x + 2x2 = -1 + 1 Combine like terms: 5 + 1 = 6 6 + 7x + 2x2 = -1 + 1 Combine like terms: -1 + 1 = 0 6 + 7x + 2x2 = 0 Factor a trinomial. (2 + x)(3 + 2x) = 0Subproblem 1
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 = -2Subproblem 2
Set the factor '(3 + 2x)' equal to zero and attempt to solve: Simplifying 3 + 2x = 0 Solving 3 + 2x = 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 + 2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2x = 0 + -3 2x = 0 + -3 Combine like terms: 0 + -3 = -3 2x = -3 Divide each side by '2'. x = -1.5 Simplifying x = -1.5Solution
x = {-2, -1.5}
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