factoring polynomials

Algebra
Tutor: None Selected Time limit: 1 Day

27r^3+64

Aug 25th, 2014

27r^3+64

=(3r)^3+4^3.            [a3 + b3 = (a + b)3 - 3 a b (a + b) ]

=(3r+4)^3- 3*3r*4(3r+4)

=(3r+4)^3 -36r(3r+4)


Aug 25th, 2014

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