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Simplifying 8r2 = 30 + 34r Solving 8r2 = 30 + 34r Solving for variable 'r'. Reorder the terms: -30 + -34r + 8r2 = 30 + 34r + -30 + -34r Reorder the terms: -30 + -34r + 8r2 = 30 + -30 + 34r + -34r Combine like terms: 30 + -30 = 0 -30 + -34r + 8r2 = 0 + 34r + -34r -30 + -34r + 8r2 = 34r + -34r Combine like terms: 34r + -34r = 0 -30 + -34r + 8r2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-15 + -17r + 4r2) = 0 Factor a trinomial. 2((-3 + -4r)(5 + -1r)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-3 + -4r)' equal to zero and attempt to solve: Simplifying -3 + -4r = 0 Solving -3 + -4r = 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 + -4r = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -4r = 0 + 3 -4r = 0 + 3 Combine like terms: 0 + 3 = 3 -4r = 3 Divide each side by '-4'. r = -0.75 Simplifying r = -0.75Subproblem 2
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 = {-0.75, 5}
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