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Simplifying (0.5 * 2x) * x + -9 = 0 Multiply 0.5 * 2 (1x) * x + -9 = 0 Remove parenthesis around (1x) 1x * x + -9 = 0 Multiply x * x 1x2 + -9 = 0 Reorder the terms: -9 + 1x2 = 0 Solving -9 + 1x2 = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 1x2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 1x2 = 0 + 9 1x2 = 0 + 9 Combine like terms: 0 + 9 = 9 1x2 = 9 Divide each side by '1'. x2 = 9 Simplifying x2 = 9 Take the square root of each side: x = {-3, 3}
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