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Simplifying (x + 4)(x + -5)(x + -7) = 0 Reorder the terms: (4 + x)(x + -5)(x + -7) = 0 Reorder the terms: (4 + x)(-5 + x)(x + -7) = 0 Reorder the terms: (4 + x)(-5 + x)(-7 + x) = 0 Multiply (4 + x) * (-5 + x) (4(-5 + x) + x(-5 + x))(-7 + x) = 0 ((-5 * 4 + x * 4) + x(-5 + x))(-7 + x) = 0 ((-20 + 4x) + x(-5 + x))(-7 + x) = 0 (-20 + 4x + (-5 * x + x * x))(-7 + x) = 0 (-20 + 4x + (-5x + x2))(-7 + x) = 0 Combine like terms: 4x + -5x = -1x (-20 + -1x + x2)(-7 + x) = 0 Multiply (-20 + -1x + x2) * (-7 + x) (-20(-7 + x) + -1x * (-7 + x) + x2(-7 + x)) = 0 ((-7 * -20 + x * -20) + -1x * (-7 + x) + x2(-7 + x)) = 0 ((140 + -20x) + -1x * (-7 + x) + x2(-7 + x)) = 0 (140 + -20x + (-7 * -1x + x * -1x) + x2(-7 + x)) = 0 (140 + -20x + (7x + -1x2) + x2(-7 + x)) = 0 (140 + -20x + 7x + -1x2 + (-7 * x2 + x * x2)) = 0 (140 + -20x + 7x + -1x2 + (-7x2 + x3)) = 0 Combine like terms: -20x + 7x = -13x (140 + -13x + -1x2 + -7x2 + x3) = 0 Combine like terms: -1x2 + -7x2 = -8x2 (140 + -13x + -8x2 + x3) = 0 Solving 140 + -13x + -8x2 + x3 = 0 Solving for variable 'x'. The solution to this equation could not be determined.
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