Zrób mnożenie i zredukuj wyrazy podobne:
(x - y) (x2 - xy + y2) =
(x - y) (x2 - xy + y2) = x3+x2y+xy2-x2y+xy2+y3=x3+y3+2xy2
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(x - y) (x2 - xy + y2) = x3+x2y+xy2-x2y+xy2+y3=x3+y3+2xy2