Question

Докажите что x^3-3x^2y+3xy^2-y^3=(x-y)^3 срочно

Answer 1

X^3-y^3-3xy(x-y) =

(X-y)(x^2+xy+y^2)-3xy(x-y)

(x-y) ( x^2+xy-3xy+y^2)

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

(X-y) (x-y)^2

(X-y)^3