1.

Find the identity (x-y)³​

Answer»

ANSWER:

(x-y)^3  

=>  (x-y)(x-y)(x-y)  

=>  (x^2 + y^2 -2XY)(x-y)  

=>  x^3 - x^2y + xy^2 - y^3 - 2x^2y + 2xy^2  

=>  x^3 - y^3 -3x^2y + 3xy^2

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