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Simplifying 2r(2r + 2) + (3r + 1) = r + -1 Reorder the terms: 2r(2 + 2r) + (3r + 1) = r + -1 (2 * 2r + 2r * 2r) + (3r + 1) = r + -1 (4r + 4r2) + (3r + 1) = r + -1 Reorder the terms: 4r + 4r2 + (1 + 3r) = r + -1 Remove parenthesis around (1 + 3r) 4r + 4r2 + 1 + 3r = r + -1 Reorder the terms: 1 + 4r + 3r + 4r2 = r + -1 Combine like terms: 4r + 3r = 7r 1 + 7r + 4r2 = r + -1 Reorder the terms: 1 + 7r + 4r2 = -1 + r Solving 1 + 7r + 4r2 = -1 + r Solving for variable 'r'. Reorder the terms: 1 + 1 + 7r + -1r + 4r2 = -1 + r + 1 + -1r Combine like terms: 1 + 1 = 2 2 + 7r + -1r + 4r2 = -1 + r + 1 + -1r Combine like terms: 7r + -1r = 6r 2 + 6r + 4r2 = -1 + r + 1 + -1r Reorder the terms: 2 + 6r + 4r2 = -1 + 1 + r + -1r Combine like terms: -1 + 1 = 0 2 + 6r + 4r2 = 0 + r + -1r 2 + 6r + 4r2 = r + -1r Combine like terms: r + -1r = 0 2 + 6r + 4r2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(1 + 3r + 2r2) = 0 Factor a trinomial. 2((1 + r)(1 + 2r)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(1 + r)' equal to zero and attempt to solve: Simplifying 1 + r = 0 Solving 1 + r = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + r = 0 + -1 r = 0 + -1 Combine like terms: 0 + -1 = -1 r = -1 Simplifying r = -1Subproblem 2
Set the factor '(1 + 2r)' equal to zero and attempt to solve: Simplifying 1 + 2r = 0 Solving 1 + 2r = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 2r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2r = 0 + -1 2r = 0 + -1 Combine like terms: 0 + -1 = -1 2r = -1 Divide each side by '2'. r = -0.5 Simplifying r = -0.5Solution
r = {-1, -0.5}
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