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Simplifying 7(x + 4)(x + 3) = 0 Reorder the terms: 7(4 + x)(x + 3) = 0 Reorder the terms: 7(4 + x)(3 + x) = 0 Multiply (4 + x) * (3 + x) 7(4(3 + x) + x(3 + x)) = 0 7((3 * 4 + x * 4) + x(3 + x)) = 0 7((12 + 4x) + x(3 + x)) = 0 7(12 + 4x + (3 * x + x * x)) = 0 7(12 + 4x + (3x + x2)) = 0 Combine like terms: 4x + 3x = 7x 7(12 + 7x + x2) = 0 (12 * 7 + 7x * 7 + x2 * 7) = 0 (84 + 49x + 7x2) = 0 Solving 84 + 49x + 7x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '7'. 7(12 + 7x + x2) = 0 Factor a trinomial. 7((4 + x)(3 + x)) = 0 Ignore the factor 7.Subproblem 1
Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4Subproblem 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 = {-4, -3}
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