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Simplifying r2 = -25 + -10r Solving r2 = -25 + -10r Solving for variable 'r'. Reorder the terms: 25 + 10r + r2 = -25 + -10r + 25 + 10r Reorder the terms: 25 + 10r + r2 = -25 + 25 + -10r + 10r Combine like terms: -25 + 25 = 0 25 + 10r + r2 = 0 + -10r + 10r 25 + 10r + r2 = -10r + 10r Combine like terms: -10r + 10r = 0 25 + 10r + r2 = 0 Factor a trinomial. (5 + r)(5 + r) = 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 '(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 = -5Solution
r = {-5, -5}
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