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Simplifying 3x(3 + -2) * 3x = 31 Combine like terms: 3 + -2 = 1 3x(1) * 3x = 31 Reorder the terms for easier multiplication: 3 * 1 * 3x * x = 31 Multiply 3 * 1 3 * 3x * x = 31 Multiply 3 * 3 9x * x = 31 Multiply x * x 9x2 = 31 Solving 9x2 = 31 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '9'. x2 = 3.444444444 Simplifying x2 = 3.444444444 Take the square root of each side: x = {-1.855921454, 1.855921454}
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