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Simplifying 7r2 + -60r + 36 = 4 Reorder the terms: 36 + -60r + 7r2 = 4 Solving 36 + -60r + 7r2 = 4 Solving for variable 'r'. Reorder the terms: 36 + -4 + -60r + 7r2 = 4 + -4 Combine like terms: 36 + -4 = 32 32 + -60r + 7r2 = 4 + -4 Combine like terms: 4 + -4 = 0 32 + -60r + 7r2 = 0 Factor a trinomial. (4 + -7r)(8 + -1r) = 0Subproblem 1
Set the factor '(4 + -7r)' equal to zero and attempt to solve: Simplifying 4 + -7r = 0 Solving 4 + -7r = 0 Move all terms containing r to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -7r = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -7r = 0 + -4 -7r = 0 + -4 Combine like terms: 0 + -4 = -4 -7r = -4 Divide each side by '-7'. r = 0.5714285714 Simplifying r = 0.5714285714Subproblem 2
Set the factor '(8 + -1r)' equal to zero and attempt to solve: Simplifying 8 + -1r = 0 Solving 8 + -1r = 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 + -1r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1r = 0 + -8 -1r = 0 + -8 Combine like terms: 0 + -8 = -8 -1r = -8 Divide each side by '-1'. r = 8 Simplifying r = 8Solution
r = {0.5714285714, 8}
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