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Simplifying 4x2 + 12 + 9 = 0 Reorder the terms: 12 + 9 + 4x2 = 0 Combine like terms: 12 + 9 = 21 21 + 4x2 = 0 Solving 21 + 4x2 = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 4x2 = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 4x2 = 0 + -21 4x2 = 0 + -21 Combine like terms: 0 + -21 = -21 4x2 = -21 Divide each side by '4'. x2 = -5.25 Simplifying x2 = -5.25 Reorder the terms: 5.25 + x2 = -5.25 + 5.25 Combine like terms: -5.25 + 5.25 = 0.00 5.25 + x2 = 0.00 The solution to this equation could not be determined.
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