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Simplifying 8r2 = 18 + 18r Solving 8r2 = 18 + 18r Solving for variable 'r'. Reorder the terms: -18 + -18r + 8r2 = 18 + 18r + -18 + -18r Reorder the terms: -18 + -18r + 8r2 = 18 + -18 + 18r + -18r Combine like terms: 18 + -18 = 0 -18 + -18r + 8r2 = 0 + 18r + -18r -18 + -18r + 8r2 = 18r + -18r Combine like terms: 18r + -18r = 0 -18 + -18r + 8r2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-9 + -9r + 4r2) = 0 Factor a trinomial. 2((-3 + -4r)(3 + -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 '(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 = 3Solution
r = {-0.75, 3}
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