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Simplifying (x + -1)(x2 + x + 5) = x3 + 4x + -5 Reorder the terms: (-1 + x)(x2 + x + 5) = x3 + 4x + -5 Reorder the terms: (-1 + x)(5 + x + x2) = x3 + 4x + -5 Multiply (-1 + x) * (5 + x + x2) (-1(5 + x + x2) + x(5 + x + x2)) = x3 + 4x + -5 ((5 * -1 + x * -1 + x2 * -1) + x(5 + x + x2)) = x3 + 4x + -5 ((-5 + -1x + -1x2) + x(5 + x + x2)) = x3 + 4x + -5 (-5 + -1x + -1x2 + (5 * x + x * x + x2 * x)) = x3 + 4x + -5 (-5 + -1x + -1x2 + (5x + x2 + x3)) = x3 + 4x + -5 Reorder the terms: (-5 + -1x + 5x + -1x2 + x2 + x3) = x3 + 4x + -5 Combine like terms: -1x + 5x = 4x (-5 + 4x + -1x2 + x2 + x3) = x3 + 4x + -5 Combine like terms: -1x2 + x2 = 0 (-5 + 4x + 0 + x3) = x3 + 4x + -5 (-5 + 4x + x3) = x3 + 4x + -5 Reorder the terms: -5 + 4x + x3 = -5 + 4x + x3 Add '5' to each side of the equation. -5 + 4x + 5 + x3 = -5 + 4x + 5 + x3 Reorder the terms: -5 + 5 + 4x + x3 = -5 + 4x + 5 + x3 Combine like terms: -5 + 5 = 0 0 + 4x + x3 = -5 + 4x + 5 + x3 4x + x3 = -5 + 4x + 5 + x3 Reorder the terms: 4x + x3 = -5 + 5 + 4x + x3 Combine like terms: -5 + 5 = 0 4x + x3 = 0 + 4x + x3 4x + x3 = 4x + x3 Add '-4x' to each side of the equation. 4x + -4x + x3 = 4x + -4x + x3 Combine like terms: 4x + -4x = 0 0 + x3 = 4x + -4x + x3 x3 = 4x + -4x + x3 Combine like terms: 4x + -4x = 0 x3 = 0 + x3 x3 = x3 Add '-1x3' to each side of the equation. x3 + -1x3 = x3 + -1x3 Combine like terms: x3 + -1x3 = 0 0 = x3 + -1x3 Combine like terms: x3 + -1x3 = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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