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Simplifying 9r3 + 16r2 + -4r = 0 Reorder the terms: -4r + 16r2 + 9r3 = 0 Solving -4r + 16r2 + 9r3 = 0 Solving for variable 'r'. Factor out the Greatest Common Factor (GCF), 'r'. r(-4 + 16r + 9r2) = 0 Factor a trinomial. r((-2 + -1r)(2 + -9r)) = 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 '(-2 + -1r)' equal to zero and attempt to solve: Simplifying -2 + -1r = 0 Solving -2 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1r = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1r = 0 + 2 -1r = 0 + 2 Combine like terms: 0 + 2 = 2 -1r = 2 Divide each side by '-1'. r = -2 Simplifying r = -2Subproblem 3
Set the factor '(2 + -9r)' equal to zero and attempt to solve: Simplifying 2 + -9r = 0 Solving 2 + -9r = 0 Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -9r = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -9r = 0 + -2 -9r = 0 + -2 Combine like terms: 0 + -2 = -2 -9r = -2 Divide each side by '-9'. r = 0.2222222222 Simplifying r = 0.2222222222Solution
r = {0, -2, 0.2222222222}
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