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Simplifying x(x + -4) = x2 + 5x + 8 Reorder the terms: x(-4 + x) = x2 + 5x + 8 (-4 * x + x * x) = x2 + 5x + 8 (-4x + x2) = x2 + 5x + 8 Reorder the terms: -4x + x2 = 8 + 5x + x2 Add '-1x2' to each side of the equation. -4x + x2 + -1x2 = 8 + 5x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -4x + 0 = 8 + 5x + x2 + -1x2 -4x = 8 + 5x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -4x = 8 + 5x + 0 -4x = 8 + 5x Solving -4x = 8 + 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. -4x + -5x = 8 + 5x + -5x Combine like terms: -4x + -5x = -9x -9x = 8 + 5x + -5x Combine like terms: 5x + -5x = 0 -9x = 8 + 0 -9x = 8 Divide each side by '-9'. x = -0.8888888889 Simplifying x = -0.8888888889
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