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Simplifying (x + 5)(x + 7) = 0 Reorder the terms: (5 + x)(x + 7) = 0 Reorder the terms: (5 + x)(7 + x) = 0 Multiply (5 + x) * (7 + x) (5(7 + x) + x(7 + x)) = 0 ((7 * 5 + x * 5) + x(7 + x)) = 0 ((35 + 5x) + x(7 + x)) = 0 (35 + 5x + (7 * x + x * x)) = 0 (35 + 5x + (7x + x2)) = 0 Combine like terms: 5x + 7x = 12x (35 + 12x + x2) = 0 Solving 35 + 12x + x2 = 0 Solving for variable 'x'. Factor a trinomial. (7 + x)(5 + x) = 0Subproblem 1
Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7Subproblem 2
Set the factor '(5 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 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 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Simplifying x = -5Solution
x = {-7, -5}
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