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Simplifying x(x + -2) = x2 + 5x + 4 Reorder the terms: x(-2 + x) = x2 + 5x + 4 (-2 * x + x * x) = x2 + 5x + 4 (-2x + x2) = x2 + 5x + 4 Reorder the terms: -2x + x2 = 4 + 5x + x2 Add '-1x2' to each side of the equation. -2x + x2 + -1x2 = 4 + 5x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -2x + 0 = 4 + 5x + x2 + -1x2 -2x = 4 + 5x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -2x = 4 + 5x + 0 -2x = 4 + 5x Solving -2x = 4 + 5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5x' to each side of the equation. -2x + -5x = 4 + 5x + -5x Combine like terms: -2x + -5x = -7x -7x = 4 + 5x + -5x Combine like terms: 5x + -5x = 0 -7x = 4 + 0 -7x = 4 Divide each side by '-7'. x = -0.5714285714 Simplifying x = -0.5714285714
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