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Simplifying (2r + -5)(4r3 + -3r2 + 3r + -2) = 0 Reorder the terms: (-5 + 2r)(4r3 + -3r2 + 3r + -2) = 0 Reorder the terms: (-5 + 2r)(-2 + 3r + -3r2 + 4r3) = 0 Multiply (-5 + 2r) * (-2 + 3r + -3r2 + 4r3) (-5(-2 + 3r + -3r2 + 4r3) + 2r * (-2 + 3r + -3r2 + 4r3)) = 0 ((-2 * -5 + 3r * -5 + -3r2 * -5 + 4r3 * -5) + 2r * (-2 + 3r + -3r2 + 4r3)) = 0 ((10 + -15r + 15r2 + -20r3) + 2r * (-2 + 3r + -3r2 + 4r3)) = 0 (10 + -15r + 15r2 + -20r3 + (-2 * 2r + 3r * 2r + -3r2 * 2r + 4r3 * 2r)) = 0 (10 + -15r + 15r2 + -20r3 + (-4r + 6r2 + -6r3 + 8r4)) = 0 Reorder the terms: (10 + -15r + -4r + 15r2 + 6r2 + -20r3 + -6r3 + 8r4) = 0 Combine like terms: -15r + -4r = -19r (10 + -19r + 15r2 + 6r2 + -20r3 + -6r3 + 8r4) = 0 Combine like terms: 15r2 + 6r2 = 21r2 (10 + -19r + 21r2 + -20r3 + -6r3 + 8r4) = 0 Combine like terms: -20r3 + -6r3 = -26r3 (10 + -19r + 21r2 + -26r3 + 8r4) = 0 Solving 10 + -19r + 21r2 + -26r3 + 8r4 = 0 Solving for variable 'r'. The solution to this equation could not be determined.
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