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Simplifying 189 = 3(x2 + 2x) Reorder the terms: 189 = 3(2x + x2) 189 = (2x * 3 + x2 * 3) 189 = (6x + 3x2) Solving 189 = 6x + 3x2 Solving for variable 'x'. Reorder the terms: 189 + -6x + -3x2 = 6x + -6x + 3x2 + -3x2 Combine like terms: 6x + -6x = 0 189 + -6x + -3x2 = 0 + 3x2 + -3x2 189 + -6x + -3x2 = 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 189 + -6x + -3x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(63 + -2x + -1x2) = 0 Factor a trinomial. 3((7 + -1x)(9 + x)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 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 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7Subproblem 2
Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 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 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9Solution
x = {7, -9}
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