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Simplifying 81r2 + -144r + 64 = 0 Reorder the terms: 64 + -144r + 81r2 = 0 Solving 64 + -144r + 81r2 = 0 Solving for variable 'r'. Factor a trinomial. (8 + -9r)(8 + -9r) = 0Subproblem 1
Set the factor '(8 + -9r)' equal to zero and attempt to solve: Simplifying 8 + -9r = 0 Solving 8 + -9r = 0 Move all terms containing r to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -9r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -9r = 0 + -8 -9r = 0 + -8 Combine like terms: 0 + -8 = -8 -9r = -8 Divide each side by '-9'. r = 0.8888888889 Simplifying r = 0.8888888889Subproblem 2
Set the factor '(8 + -9r)' equal to zero and attempt to solve: Simplifying 8 + -9r = 0 Solving 8 + -9r = 0 Move all terms containing r to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -9r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -9r = 0 + -8 -9r = 0 + -8 Combine like terms: 0 + -8 = -8 -9r = -8 Divide each side by '-9'. r = 0.8888888889 Simplifying r = 0.8888888889Solution
r = {0.8888888889, 0.8888888889}
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