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Simplifying (2r + 8)(3r + -4) = 0 Reorder the terms: (8 + 2r)(3r + -4) = 0 Reorder the terms: (8 + 2r)(-4 + 3r) = 0 Multiply (8 + 2r) * (-4 + 3r) (8(-4 + 3r) + 2r * (-4 + 3r)) = 0 ((-4 * 8 + 3r * 8) + 2r * (-4 + 3r)) = 0 ((-32 + 24r) + 2r * (-4 + 3r)) = 0 (-32 + 24r + (-4 * 2r + 3r * 2r)) = 0 (-32 + 24r + (-8r + 6r2)) = 0 Combine like terms: 24r + -8r = 16r (-32 + 16r + 6r2) = 0 Solving -32 + 16r + 6r2 = 0 Solving for variable 'r'. Factor out the Greatest Common Factor (GCF), '2'. 2(-16 + 8r + 3r2) = 0 Factor a trinomial. 2((-4 + -1r)(4 + -3r)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-4 + -1r)' equal to zero and attempt to solve: Simplifying -4 + -1r = 0 Solving -4 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1r = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1r = 0 + 4 -1r = 0 + 4 Combine like terms: 0 + 4 = 4 -1r = 4 Divide each side by '-1'. r = -4 Simplifying r = -4Subproblem 2
Set the factor '(4 + -3r)' equal to zero and attempt to solve: Simplifying 4 + -3r = 0 Solving 4 + -3r = 0 Move all terms containing r to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -3r = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -3r = 0 + -4 -3r = 0 + -4 Combine like terms: 0 + -4 = -4 -3r = -4 Divide each side by '-3'. r = 1.333333333 Simplifying r = 1.333333333Solution
r = {-4, 1.333333333}
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