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Simplifying (2r + 5)(3r2 + -16r + 5) = 0 Reorder the terms: (5 + 2r)(3r2 + -16r + 5) = 0 Reorder the terms: (5 + 2r)(5 + -16r + 3r2) = 0 Multiply (5 + 2r) * (5 + -16r + 3r2) (5(5 + -16r + 3r2) + 2r * (5 + -16r + 3r2)) = 0 ((5 * 5 + -16r * 5 + 3r2 * 5) + 2r * (5 + -16r + 3r2)) = 0 ((25 + -80r + 15r2) + 2r * (5 + -16r + 3r2)) = 0 (25 + -80r + 15r2 + (5 * 2r + -16r * 2r + 3r2 * 2r)) = 0 (25 + -80r + 15r2 + (10r + -32r2 + 6r3)) = 0 Reorder the terms: (25 + -80r + 10r + 15r2 + -32r2 + 6r3) = 0 Combine like terms: -80r + 10r = -70r (25 + -70r + 15r2 + -32r2 + 6r3) = 0 Combine like terms: 15r2 + -32r2 = -17r2 (25 + -70r + -17r2 + 6r3) = 0 Solving 25 + -70r + -17r2 + 6r3 = 0 Solving for variable 'r'. The solution to this equation could not be determined.
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