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Simplifying 3x2 + -36x = 84 Reorder the terms: -36x + 3x2 = 84 Solving -36x + 3x2 = 84 Solving for variable 'x'. Reorder the terms: -84 + -36x + 3x2 = 84 + -84 Combine like terms: 84 + -84 = 0 -84 + -36x + 3x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(-28 + -12x + x2) = 0 Factor a trinomial. 3((-2 + -1x)(14 + -1x)) = 0 Ignore the factor 3.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 '(14 + -1x)' equal to zero and attempt to solve: Simplifying 14 + -1x = 0 Solving 14 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + -1x = 0 + -14 Combine like terms: 14 + -14 = 0 0 + -1x = 0 + -14 -1x = 0 + -14 Combine like terms: 0 + -14 = -14 -1x = -14 Divide each side by '-1'. x = 14 Simplifying x = 14Solution
x = {-2, 14}
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