Question

how to solve xy multiply with

Answer 1

Here ,
(x+y)×(x-y)= x×(x-y)+y×(x-y)
=x^2-xy+xy-y^2
=x^2-y^2

Or you can use the identity :-

(x+y)×(x-y)=x^2-y^2

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Answer 2

=(x+y)(x-y)

$x { }^{2} - y {}^{2}$