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Simplifying r4 + 4r3 + 6r2 + 4r + 1 = 0 Reorder the terms: 1 + 4r + 6r2 + 4r3 + r4 = 0 Solving 1 + 4r + 6r2 + 4r3 + r4 = 0 Solving for variable 'r'. The solution to this equation could not be determined.
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