(x+y) (x2- xy+y2) solve the problem
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Answer:
(x+y)(x2-xy+y2)
= x(x2-xy+y2)+y(x2-xy+y2)
= x3-x2y+xy2 + x2y-xy2+y3
= x3+y3-x2y+x2y+xy2-xy2
=x3+y3
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