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Simplifying x2 = (x + 1)(x + -1) Reorder the terms: x2 = (1 + x)(x + -1) Reorder the terms: x2 = (1 + x)(-1 + x) Multiply (1 + x) * (-1 + x) x2 = (1(-1 + x) + x(-1 + x)) x2 = ((-1 * 1 + x * 1) + x(-1 + x)) x2 = ((-1 + 1x) + x(-1 + x)) x2 = (-1 + 1x + (-1 * x + x * x)) x2 = (-1 + 1x + (-1x + x2)) Combine like terms: 1x + -1x = 0 x2 = (-1 + 0 + x2) x2 = (-1 + x2) Add '-1x2' to each side of the equation. x2 + -1x2 = -1 + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 0 = -1 + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 0 = -1 + 0 0 = -1 Solving 0 = -1 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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