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Simplifying 12x4 + -28x3 + -9x2 + 28x + 12 = 0 Reorder the terms: 12 + 28x + -9x2 + -28x3 + 12x4 = 0 Solving 12 + 28x + -9x2 + -28x3 + 12x4 = 0 Solving for variable 'x'. The solution to this equation could not be determined.
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