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Simplifying 7x2 + 56x = -84 Reorder the terms: 56x + 7x2 = -84 Solving 56x + 7x2 = -84 Solving for variable 'x'. Reorder the terms: 84 + 56x + 7x2 = -84 + 84 Combine like terms: -84 + 84 = 0 84 + 56x + 7x2 = 0 Factor out the Greatest Common Factor (GCF), '7'. 7(12 + 8x + x2) = 0 Factor a trinomial. 7((6 + x)(2 + x)) = 0 Ignore the factor 7.Subproblem 1
Set the factor '(6 + x)' equal to zero and attempt to solve: Simplifying 6 + x = 0 Solving 6 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + x = 0 + -6 x = 0 + -6 Combine like terms: 0 + -6 = -6 x = -6 Simplifying x = -6Subproblem 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 = {-6, -2}
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