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Simplifying 3x2 = 3x + 90 Reorder the terms: 3x2 = 90 + 3x Solving 3x2 = 90 + 3x Solving for variable 'x'. Reorder the terms: -90 + -3x + 3x2 = 90 + 3x + -90 + -3x Reorder the terms: -90 + -3x + 3x2 = 90 + -90 + 3x + -3x Combine like terms: 90 + -90 = 0 -90 + -3x + 3x2 = 0 + 3x + -3x -90 + -3x + 3x2 = 3x + -3x Combine like terms: 3x + -3x = 0 -90 + -3x + 3x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(-30 + -1x + x2) = 0 Factor a trinomial. 3((-5 + -1x)(6 + -1x)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5Subproblem 2
Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 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 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6Solution
x = {-5, 6}
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