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Simplifying r2 + 26r + 169 = 0 Reorder the terms: 169 + 26r + r2 = 0 Solving 169 + 26r + r2 = 0 Solving for variable 'r'. Factor a trinomial. (13 + r)(13 + r) = 0Subproblem 1
Set the factor '(13 + r)' equal to zero and attempt to solve: Simplifying 13 + r = 0 Solving 13 + r = 0 Move all terms containing r to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + r = 0 + -13 Combine like terms: 13 + -13 = 0 0 + r = 0 + -13 r = 0 + -13 Combine like terms: 0 + -13 = -13 r = -13 Simplifying r = -13Subproblem 2
Set the factor '(13 + r)' equal to zero and attempt to solve: Simplifying 13 + r = 0 Solving 13 + r = 0 Move all terms containing r to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + r = 0 + -13 Combine like terms: 13 + -13 = 0 0 + r = 0 + -13 r = 0 + -13 Combine like terms: 0 + -13 = -13 r = -13 Simplifying r = -13Solution
r = {-13, -13}
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