Problem 156 of 7
Use an identity to simplify rational expression (64 - b^3) / (4-b).
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factor numerator/denominator using identity.
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Factor numerator or denominator using identity before canceling; preserve domain restrictions.
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Solution
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1. Factor using the relevant identity.
2. Cancel common factors, not terms.
3. State restrictions from canceled factors.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Canceling terms that are not factors.