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Simplifying -3x3 + 54x = 21x2 Reorder the terms: 54x + -3x3 = 21x2 Solving 54x + -3x3 = 21x2 Solving for variable 'x'. Reorder the terms: 54x + -21x2 + -3x3 = 21x2 + -21x2 Combine like terms: 21x2 + -21x2 = 0 54x + -21x2 + -3x3 = 0 Factor out the Greatest Common Factor (GCF), '3x'. 3x(18 + -7x + -1x2) = 0 Factor a trinomial. 3x((2 + -1x)(9 + x)) = 0 Ignore the factor 3.Subproblem 1
Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0Subproblem 2
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 3
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 = {0, 2, -9}
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