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Simplifying 72 = (x + -1)(x)(x + 9) Reorder the terms: 72 = (-1 + x)(x)(x + 9) Reorder the terms: 72 = (-1 + x) * x(9 + x) Reorder the terms for easier multiplication: 72 = x(-1 + x)(9 + x) Multiply (-1 + x) * (9 + x) 72 = x(-1(9 + x) + x(9 + x)) 72 = x((9 * -1 + x * -1) + x(9 + x)) 72 = x((-9 + -1x) + x(9 + x)) 72 = x(-9 + -1x + (9 * x + x * x)) 72 = x(-9 + -1x + (9x + x2)) Combine like terms: -1x + 9x = 8x 72 = x(-9 + 8x + x2) 72 = (-9 * x + 8x * x + x2 * x) 72 = (-9x + 8x2 + x3) Solving 72 = -9x + 8x2 + x3 Solving for variable 'x'. Reorder the terms: 72 + 9x + -8x2 + -1x3 = -9x + 9x + 8x2 + -8x2 + x3 + -1x3 Combine like terms: -9x + 9x = 0 72 + 9x + -8x2 + -1x3 = 0 + 8x2 + -8x2 + x3 + -1x3 72 + 9x + -8x2 + -1x3 = 8x2 + -8x2 + x3 + -1x3 Combine like terms: 8x2 + -8x2 = 0 72 + 9x + -8x2 + -1x3 = 0 + x3 + -1x3 72 + 9x + -8x2 + -1x3 = x3 + -1x3 Combine like terms: x3 + -1x3 = 0 72 + 9x + -8x2 + -1x3 = 0 The solution to this equation could not be determined.
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