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Simplifying x(x + -2) = (x2) + 7x + 2 Reorder the terms: x(-2 + x) = (x2) + 7x + 2 (-2 * x + x * x) = (x2) + 7x + 2 (-2x + x2) = (x2) + 7x + 2 -2x + x2 = x2 + 7x + 2 Reorder the terms: -2x + x2 = 2 + 7x + x2 Add '-1x2' to each side of the equation. -2x + x2 + -1x2 = 2 + 7x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -2x + 0 = 2 + 7x + x2 + -1x2 -2x = 2 + 7x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -2x = 2 + 7x + 0 -2x = 2 + 7x Solving -2x = 2 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. -2x + -7x = 2 + 7x + -7x Combine like terms: -2x + -7x = -9x -9x = 2 + 7x + -7x Combine like terms: 7x + -7x = 0 -9x = 2 + 0 -9x = 2 Divide each side by '-9'. x = -0.2222222222 Simplifying x = -0.2222222222
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