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Simplifying r3 = 2r2 + 15r Reorder the terms: r3 = 15r + 2r2 Solving r3 = 15r + 2r2 Solving for variable 'r'. Reorder the terms: -15r + -2r2 + r3 = 15r + 2r2 + -15r + -2r2 Reorder the terms: -15r + -2r2 + r3 = 15r + -15r + 2r2 + -2r2 Combine like terms: 15r + -15r = 0 -15r + -2r2 + r3 = 0 + 2r2 + -2r2 -15r + -2r2 + r3 = 2r2 + -2r2 Combine like terms: 2r2 + -2r2 = 0 -15r + -2r2 + r3 = 0 Factor out the Greatest Common Factor (GCF), 'r'. r(-15 + -2r + r2) = 0 Factor a trinomial. r((-3 + -1r)(5 + -1r)) = 0Subproblem 1
Set the factor 'r' equal to zero and attempt to solve: Simplifying r = 0 Solving r = 0 Move all terms containing r to the left, all other terms to the right. Simplifying r = 0Subproblem 2
Set the factor '(-3 + -1r)' equal to zero and attempt to solve: Simplifying -3 + -1r = 0 Solving -3 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1r = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1r = 0 + 3 -1r = 0 + 3 Combine like terms: 0 + 3 = 3 -1r = 3 Divide each side by '-1'. r = -3 Simplifying r = -3Subproblem 3
Set the factor '(5 + -1r)' equal to zero and attempt to solve: Simplifying 5 + -1r = 0 Solving 5 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1r = 0 + -5 -1r = 0 + -5 Combine like terms: 0 + -5 = -5 -1r = -5 Divide each side by '-1'. r = 5 Simplifying r = 5Solution
r = {0, -3, 5}
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