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Simplifying x + 7 = x2 + 10x + 25 Reorder the terms: 7 + x = x2 + 10x + 25 Reorder the terms: 7 + x = 25 + 10x + x2 Solving 7 + x = 25 + 10x + x2 Solving for variable 'x'. Reorder the terms: 7 + -25 + x + -10x + -1x2 = 25 + 10x + x2 + -25 + -10x + -1x2 Combine like terms: 7 + -25 = -18 -18 + x + -10x + -1x2 = 25 + 10x + x2 + -25 + -10x + -1x2 Combine like terms: x + -10x = -9x -18 + -9x + -1x2 = 25 + 10x + x2 + -25 + -10x + -1x2 Reorder the terms: -18 + -9x + -1x2 = 25 + -25 + 10x + -10x + x2 + -1x2 Combine like terms: 25 + -25 = 0 -18 + -9x + -1x2 = 0 + 10x + -10x + x2 + -1x2 -18 + -9x + -1x2 = 10x + -10x + x2 + -1x2 Combine like terms: 10x + -10x = 0 -18 + -9x + -1x2 = 0 + x2 + -1x2 -18 + -9x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -18 + -9x + -1x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(18 + 9x + x2) = 0 Factor a trinomial. -1((6 + x)(3 + x)) = 0 Ignore the factor -1.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 '(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 = {-6, -3}
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