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Simplifying 3x2 + -12 = 9 Reorder the terms: -12 + 3x2 = 9 Solving -12 + 3x2 = 9 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + 3x2 = 9 + 12 Combine like terms: -12 + 12 = 0 0 + 3x2 = 9 + 12 3x2 = 9 + 12 Combine like terms: 9 + 12 = 21 3x2 = 21 Divide each side by '3'. x2 = 7 Simplifying x2 = 7 Take the square root of each side: x = {-2.645751311, 2.645751311}
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