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Simplifying x(x + 2) = (x + 1) * 2 Reorder the terms: x(2 + x) = (x + 1) * 2 (2 * x + x * x) = (x + 1) * 2 (2x + x2) = (x + 1) * 2 Reorder the terms: 2x + x2 = (1 + x) * 2 Reorder the terms for easier multiplication: 2x + x2 = 2(1 + x) 2x + x2 = (1 * 2 + x * 2) 2x + x2 = (2 + 2x) Add '-2x' to each side of the equation. 2x + -2x + x2 = 2 + 2x + -2x Combine like terms: 2x + -2x = 0 0 + x2 = 2 + 2x + -2x x2 = 2 + 2x + -2x Combine like terms: 2x + -2x = 0 x2 = 2 + 0 x2 = 2 Solving x2 = 2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Simplifying x2 = 2 Take the square root of each side: x = {-1.414213562, 1.414213562}
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