Factor the sum and difference of two cubes

Factor each polynomial.
1. c³ + d³
2.p³ - 64

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c³ + d³ is a sum of two cubes.  

It is in the form of a³ + b³, and factors into the form (a + b)(a² - ab + b²)

=  (c + d)(c² - cd + d²)

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​p³ - 64 is a difference of two cubes.
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It is in the form of a³ - b³, and factors into the form (a - b)(a² + ab + b²)

=  (p - 4)(p² + 4p + 16)

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