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Simplifying 9x(x + -7) = 162 Reorder the terms: 9x(-7 + x) = 162 (-7 * 9x + x * 9x) = 162 (-63x + 9x2) = 162 Solving -63x + 9x2 = 162 Solving for variable 'x'. Reorder the terms: -162 + -63x + 9x2 = 162 + -162 Combine like terms: 162 + -162 = 0 -162 + -63x + 9x2 = 0 Factor out the Greatest Common Factor (GCF), '9'. 9(-18 + -7x + x2) = 0 Factor a trinomial. 9((-2 + -1x)(9 + -1x)) = 0 Ignore the factor 9.Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 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 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2Subproblem 2
Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9Solution
x = {-2, 9}
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