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Simplifying (r + -3)(r + -6) = 0 Reorder the terms: (-3 + r)(r + -6) = 0 Reorder the terms: (-3 + r)(-6 + r) = 0 Multiply (-3 + r) * (-6 + r) (-3(-6 + r) + r(-6 + r)) = 0 ((-6 * -3 + r * -3) + r(-6 + r)) = 0 ((18 + -3r) + r(-6 + r)) = 0 (18 + -3r + (-6 * r + r * r)) = 0 (18 + -3r + (-6r + r2)) = 0 Combine like terms: -3r + -6r = -9r (18 + -9r + r2) = 0 Solving 18 + -9r + r2 = 0 Solving for variable 'r'. Factor a trinomial. (3 + -1r)(6 + -1r) = 0Subproblem 1
Set the factor '(3 + -1r)' equal to zero and attempt to solve: Simplifying 3 + -1r = 0 Solving 3 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1r = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1r = 0 + -3 -1r = 0 + -3 Combine like terms: 0 + -3 = -3 -1r = -3 Divide each side by '-1'. r = 3 Simplifying r = 3Subproblem 2
Set the factor '(6 + -1r)' equal to zero and attempt to solve: Simplifying 6 + -1r = 0 Solving 6 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1r = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1r = 0 + -6 -1r = 0 + -6 Combine like terms: 0 + -6 = -6 -1r = -6 Divide each side by '-1'. r = 6 Simplifying r = 6Solution
r = {3, 6}
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