Помогите (x-y)(x+xy+xy+y)

Question

Помогите (x-y)(x+xy+xy+y)

Comments

(xy)-((xxy)-(xy-y))=xy-(xxy)=xy-(xy)=xy-x-у

Answer 1

X^2+2x^2y+2xy+2xy^2+y^2
(^2-в квадрате)

Answer 2

Вроде так.................

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