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Simplifying x6 + 21x4 + 84x2 + 64 = 0 Reorder the terms: 64 + 84x2 + 21x4 + x6 = 0 Solving 64 + 84x2 + 21x4 + x6 = 0 Solving for variable 'x'. The solution to this equation could not be determined.
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