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Use the sum or difference of cubes and what you already know about factoring to factor the following expressions as completely as possible. Homework Help ✎

Refer to the Math Notes box in Lesson 8.3.4 for the patterns of sums and differences of cubes.

  1. Notice that is a common factor for both terms.
    Factor it out. Then use the sum of cubes to factor it completely.
    Recall that .

  1. This is already in the form you need.
    Use the difference of cubes to factor it.
    What are the cubes?