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Simplifying x + (x * x) + -1 = x Multiply x * x x + (x2) + -1 = x x + x2 + -1 = x Reorder the terms: -1 + x + x2 = x Add '-1x' to each side of the equation. -1 + x + -1x + x2 = x + -1x Combine like terms: x + -1x = 0 -1 + 0 + x2 = x + -1x -1 + x2 = x + -1x Combine like terms: x + -1x = 0 -1 + x2 = 0 Solving -1 + x2 = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + x2 = 0 + 1 x2 = 0 + 1 Combine like terms: 0 + 1 = 1 x2 = 1 Simplifying x2 = 1 Take the square root of each side: x = {-1, 1}
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