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Simplifying 9x(x + 2) = 4 + 18x Reorder the terms: 9x(2 + x) = 4 + 18x (2 * 9x + x * 9x) = 4 + 18x (18x + 9x2) = 4 + 18x Add '-18x' to each side of the equation. 18x + -18x + 9x2 = 4 + 18x + -18x Combine like terms: 18x + -18x = 0 0 + 9x2 = 4 + 18x + -18x 9x2 = 4 + 18x + -18x Combine like terms: 18x + -18x = 0 9x2 = 4 + 0 9x2 = 4 Solving 9x2 = 4 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '9'. x2 = 0.4444444444 Simplifying x2 = 0.4444444444 Take the square root of each side: x = {-0.666666667, 0.666666667}
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