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Simplifying 77r2 + 32r + -64 = 0 Reorder the terms: -64 + 32r + 77r2 = 0 Solving -64 + 32r + 77r2 = 0 Solving for variable 'r'. Factor a trinomial. (-8 + -7r)(8 + -11r) = 0Subproblem 1
Set the factor '(-8 + -7r)' equal to zero and attempt to solve: Simplifying -8 + -7r = 0 Solving -8 + -7r = 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 + -7r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -7r = 0 + 8 -7r = 0 + 8 Combine like terms: 0 + 8 = 8 -7r = 8 Divide each side by '-7'. r = -1.142857143 Simplifying r = -1.142857143Subproblem 2
Set the factor '(8 + -11r)' equal to zero and attempt to solve: Simplifying 8 + -11r = 0 Solving 8 + -11r = 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 + -11r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -11r = 0 + -8 -11r = 0 + -8 Combine like terms: 0 + -8 = -8 -11r = -8 Divide each side by '-11'. r = 0.7272727273 Simplifying r = 0.7272727273Solution
r = {-1.142857143, 0.7272727273}
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