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Simplifying 7r2 + 36r + 5 = 0 Reorder the terms: 5 + 36r + 7r2 = 0 Solving 5 + 36r + 7r2 = 0 Solving for variable 'r'. Factor a trinomial. (5 + r)(1 + 7r) = 0Subproblem 1
Set the factor '(5 + r)' equal to zero and attempt to solve: Simplifying 5 + r = 0 Solving 5 + r = 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 + r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + r = 0 + -5 r = 0 + -5 Combine like terms: 0 + -5 = -5 r = -5 Simplifying r = -5Subproblem 2
Set the factor '(1 + 7r)' equal to zero and attempt to solve: Simplifying 1 + 7r = 0 Solving 1 + 7r = 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 + 7r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 7r = 0 + -1 7r = 0 + -1 Combine like terms: 0 + -1 = -1 7r = -1 Divide each side by '7'. r = -0.1428571429 Simplifying r = -0.1428571429Solution
r = {-5, -0.1428571429}
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