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Simplifying 55r2 + 12r + -4 = 0 Reorder the terms: -4 + 12r + 55r2 = 0 Solving -4 + 12r + 55r2 = 0 Solving for variable 'r'. Factor a trinomial. (-2 + -5r)(2 + -11r) = 0Subproblem 1
Set the factor '(-2 + -5r)' equal to zero and attempt to solve: Simplifying -2 + -5r = 0 Solving -2 + -5r = 0 Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -5r = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -5r = 0 + 2 -5r = 0 + 2 Combine like terms: 0 + 2 = 2 -5r = 2 Divide each side by '-5'. r = -0.4 Simplifying r = -0.4Subproblem 2
Set the factor '(2 + -11r)' equal to zero and attempt to solve: Simplifying 2 + -11r = 0 Solving 2 + -11r = 0 Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -11r = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -11r = 0 + -2 -11r = 0 + -2 Combine like terms: 0 + -2 = -2 -11r = -2 Divide each side by '-11'. r = 0.1818181818 Simplifying r = 0.1818181818Solution
r = {-0.4, 0.1818181818}
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