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Simplifying (x + 3)(x + 7) = 0 Reorder the terms: (3 + x)(x + 7) = 0 Reorder the terms: (3 + x)(7 + x) = 0 Multiply (3 + x) * (7 + x) (3(7 + x) + x(7 + x)) = 0 ((7 * 3 + x * 3) + x(7 + x)) = 0 ((21 + 3x) + x(7 + x)) = 0 (21 + 3x + (7 * x + x * x)) = 0 (21 + 3x + (7x + x2)) = 0 Combine like terms: 3x + 7x = 10x (21 + 10x + x2) = 0 Solving 21 + 10x + x2 = 0 Solving for variable 'x'. Factor a trinomial. (7 + x)(3 + 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 '(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 = -3Solution
x = {-7, -3}
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