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Simplifying 75 = (x)(3x) Remove parenthesis around (3x) 75 = x * 3x Reorder the terms for easier multiplication: 75 = 3x * x Multiply x * x 75 = 3x2 Solving 75 = 3x2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x2' to each side of the equation. 75 + -3x2 = 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 75 + -3x2 = 0 Add '-75' to each side of the equation. 75 + -75 + -3x2 = 0 + -75 Combine like terms: 75 + -75 = 0 0 + -3x2 = 0 + -75 -3x2 = 0 + -75 Combine like terms: 0 + -75 = -75 -3x2 = -75 Divide each side by '-3'. x2 = 25 Simplifying x2 = 25 Take the square root of each side: x = {-5, 5}
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