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Simplifying (x + -1)(x + 1) = x2 Reorder the terms: (-1 + x)(x + 1) = x2 Reorder the terms: (-1 + x)(1 + x) = x2 Multiply (-1 + x) * (1 + x) (-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)) = x2 Combine like terms: -1x + 1x = 0 (-1 + 0 + x2) = x2 (-1 + x2) = x2 Add '-1x2' to each side of the equation. -1 + x2 + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -1 + 0 = x2 + -1x2 -1 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -1 = 0 Solving -1 = 0 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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