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Simplifying x(x + 3)(x + 9) = 400 Reorder the terms: x(3 + x)(x + 9) = 400 Reorder the terms: x(3 + x)(9 + x) = 400 Multiply (3 + x) * (9 + x) x(3(9 + x) + x(9 + x)) = 400 x((9 * 3 + x * 3) + x(9 + x)) = 400 x((27 + 3x) + x(9 + x)) = 400 x(27 + 3x + (9 * x + x * x)) = 400 x(27 + 3x + (9x + x2)) = 400 Combine like terms: 3x + 9x = 12x x(27 + 12x + x2) = 400 (27 * x + 12x * x + x2 * x) = 400 (27x + 12x2 + x3) = 400 Solving 27x + 12x2 + x3 = 400 Solving for variable 'x'. Reorder the terms: -400 + 27x + 12x2 + x3 = 400 + -400 Combine like terms: 400 + -400 = 0 -400 + 27x + 12x2 + x3 = 0 The solution to this equation could not be determined.
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