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Focus E: Specialized Factoring Techniques

1.  x3 + 8 = (x)3 + (2)3                                      2. x3 + 64 = (x)3 + (4)3
                = (x + 2)(x2 - 2x + (2)2)                             = (x + 4)(x2 - 4x +(4)2)
                = (x + 2)( x2 - 2x + 4)                                 = (x + 4)(x2 - 4x + 16)

3. 27x3 + 125 = (3x)3 + (5)3
                       = (3x + 5)[(3x)2 - (3x)(5) + (5)2
                       = (3x + 5)( 9x2 - 15x + 25)