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Simplifying (4x + -5)(x2 + -4x + -1) = 0 Reorder the terms: (-5 + 4x)(x2 + -4x + -1) = 0 Reorder the terms: (-5 + 4x)(-1 + -4x + x2) = 0 Multiply (-5 + 4x) * (-1 + -4x + x2) (-5(-1 + -4x + x2) + 4x * (-1 + -4x + x2)) = 0 ((-1 * -5 + -4x * -5 + x2 * -5) + 4x * (-1 + -4x + x2)) = 0 ((5 + 20x + -5x2) + 4x * (-1 + -4x + x2)) = 0 (5 + 20x + -5x2 + (-1 * 4x + -4x * 4x + x2 * 4x)) = 0 (5 + 20x + -5x2 + (-4x + -16x2 + 4x3)) = 0 Reorder the terms: (5 + 20x + -4x + -5x2 + -16x2 + 4x3) = 0 Combine like terms: 20x + -4x = 16x (5 + 16x + -5x2 + -16x2 + 4x3) = 0 Combine like terms: -5x2 + -16x2 = -21x2 (5 + 16x + -21x2 + 4x3) = 0 Solving 5 + 16x + -21x2 + 4x3 = 0 Solving for variable 'x'. The solution to this equation could not be determined.
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