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Simplifying (4r + -8)(4r + -8) = 16 Reorder the terms: (-8 + 4r)(4r + -8) = 16 Reorder the terms: (-8 + 4r)(-8 + 4r) = 16 Multiply (-8 + 4r) * (-8 + 4r) (-8(-8 + 4r) + 4r * (-8 + 4r)) = 16 ((-8 * -8 + 4r * -8) + 4r * (-8 + 4r)) = 16 ((64 + -32r) + 4r * (-8 + 4r)) = 16 (64 + -32r + (-8 * 4r + 4r * 4r)) = 16 (64 + -32r + (-32r + 16r2)) = 16 Combine like terms: -32r + -32r = -64r (64 + -64r + 16r2) = 16 Solving 64 + -64r + 16r2 = 16 Solving for variable 'r'. Reorder the terms: 64 + -16 + -64r + 16r2 = 16 + -16 Combine like terms: 64 + -16 = 48 48 + -64r + 16r2 = 16 + -16 Combine like terms: 16 + -16 = 0 48 + -64r + 16r2 = 0 Factor out the Greatest Common Factor (GCF), '16'. 16(3 + -4r + r2) = 0 Factor a trinomial. 16((1 + -1r)(3 + -1r)) = 0 Ignore the factor 16.Subproblem 1
Set the factor '(1 + -1r)' equal to zero and attempt to solve: Simplifying 1 + -1r = 0 Solving 1 + -1r = 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 + -1r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1r = 0 + -1 -1r = 0 + -1 Combine like terms: 0 + -1 = -1 -1r = -1 Divide each side by '-1'. r = 1 Simplifying r = 1Subproblem 2
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 = 3Solution
r = {1, 3}
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