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Simplifying 5r2 + -27r + -54 = 2 Reorder the terms: -54 + -27r + 5r2 = 2 Solving -54 + -27r + 5r2 = 2 Solving for variable 'r'. Reorder the terms: -54 + -2 + -27r + 5r2 = 2 + -2 Combine like terms: -54 + -2 = -56 -56 + -27r + 5r2 = 2 + -2 Combine like terms: 2 + -2 = 0 -56 + -27r + 5r2 = 0 Factor a trinomial. (-8 + -5r)(7 + -1r) = 0Subproblem 1
Set the factor '(-8 + -5r)' equal to zero and attempt to solve: Simplifying -8 + -5r = 0 Solving -8 + -5r = 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 + -5r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -5r = 0 + 8 -5r = 0 + 8 Combine like terms: 0 + 8 = 8 -5r = 8 Divide each side by '-5'. r = -1.6 Simplifying r = -1.6Subproblem 2
Set the factor '(7 + -1r)' equal to zero and attempt to solve: Simplifying 7 + -1r = 0 Solving 7 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1r = 0 + -7 -1r = 0 + -7 Combine like terms: 0 + -7 = -7 -1r = -7 Divide each side by '-1'. r = 7 Simplifying r = 7Solution
r = {-1.6, 7}
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