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Simplifying 9.9 = x * x Multiply x * x 9.9 = x2 Solving 9.9 = x2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x2' to each side of the equation. 9.9 + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 9.9 + -1x2 = 0 Add '-9.9' to each side of the equation. 9.9 + -9.9 + -1x2 = 0 + -9.9 Combine like terms: 9.9 + -9.9 = 0.0 0.0 + -1x2 = 0 + -9.9 -1x2 = 0 + -9.9 Combine like terms: 0 + -9.9 = -9.9 -1x2 = -9.9 Divide each side by '-1'. x2 = 9.9 Simplifying x2 = 9.9 Take the square root of each side: x = {-3.146426545, 3.146426545}
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