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Factoring x^3 + y^3 = (x + y)?

+1 vote
I'm in a little need of help with my homework. Does anyone know how to explain this problem to me? Help is much appreciated. Thank you in advance.
asked Jan 21, 2013 in ALGEBRA 2 by dkinz Apprentice

1 Answer

+3 votes

x3 + y3 = (x + y)?

Note: We know that (a3 + b3) = (a + b)(a2 + ab + b2)

So,

x3 + y3 = (x + y)(x2 + xy + y2)

There fore

x3 + y3 = (x + y)(x2 + xy + y2)

answered Jan 22, 2013 by richardson Scholar

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