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Simplifying 4r2 + 12r = -5 Reorder the terms: 12r + 4r2 = -5 Solving 12r + 4r2 = -5 Solving for variable 'r'. Reorder the terms: 5 + 12r + 4r2 = -5 + 5 Combine like terms: -5 + 5 = 0 5 + 12r + 4r2 = 0 Factor a trinomial. (5 + 2r)(1 + 2r) = 0Subproblem 1
Set the factor '(5 + 2r)' equal to zero and attempt to solve: Simplifying 5 + 2r = 0 Solving 5 + 2r = 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 + 2r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 2r = 0 + -5 2r = 0 + -5 Combine like terms: 0 + -5 = -5 2r = -5 Divide each side by '2'. r = -2.5 Simplifying r = -2.5Subproblem 2
Set the factor '(1 + 2r)' equal to zero and attempt to solve: Simplifying 1 + 2r = 0 Solving 1 + 2r = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 2r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2r = 0 + -1 2r = 0 + -1 Combine like terms: 0 + -1 = -1 2r = -1 Divide each side by '2'. r = -0.5 Simplifying r = -0.5Solution
r = {-2.5, -0.5}
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