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Simplifying X2 + -9 = 0 Reorder the terms: -9 + X2 = 0 Solving -9 + X2 = 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 + X2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + X2 = 0 + 9 X2 = 0 + 9 Combine like terms: 0 + 9 = 9 X2 = 9 Simplifying X2 = 9 Take the square root of each side: X = {-3, 3}
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