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Simplifying (11r + 7)(4r + -7) = 0 Reorder the terms: (7 + 11r)(4r + -7) = 0 Reorder the terms: (7 + 11r)(-7 + 4r) = 0 Multiply (7 + 11r) * (-7 + 4r) (7(-7 + 4r) + 11r * (-7 + 4r)) = 0 ((-7 * 7 + 4r * 7) + 11r * (-7 + 4r)) = 0 ((-49 + 28r) + 11r * (-7 + 4r)) = 0 (-49 + 28r + (-7 * 11r + 4r * 11r)) = 0 (-49 + 28r + (-77r + 44r2)) = 0 Combine like terms: 28r + -77r = -49r (-49 + -49r + 44r2) = 0 Solving -49 + -49r + 44r2 = 0 Solving for variable 'r'. Factor a trinomial. (-7 + -11r)(7 + -4r) = 0Subproblem 1
Set the factor '(-7 + -11r)' equal to zero and attempt to solve: Simplifying -7 + -11r = 0 Solving -7 + -11r = 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 + -11r = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -11r = 0 + 7 -11r = 0 + 7 Combine like terms: 0 + 7 = 7 -11r = 7 Divide each side by '-11'. r = -0.6363636364 Simplifying r = -0.6363636364Subproblem 2
Set the factor '(7 + -4r)' equal to zero and attempt to solve: Simplifying 7 + -4r = 0 Solving 7 + -4r = 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 + -4r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -4r = 0 + -7 -4r = 0 + -7 Combine like terms: 0 + -7 = -7 -4r = -7 Divide each side by '-4'. r = 1.75 Simplifying r = 1.75Solution
r = {-0.6363636364, 1.75}
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