Answer:
x²-2xy+y²
Explanation:
(x-y)² is the same as (x-y)(x-y).
First you would do x×x=x²
Then you would do x×-y= -xy
After that you do -y×x= -xy
Then do -y×-y= y²
You would then put it into an equation like this:
x²-xy-xy+y²
And then simplify it to:
x²-2xy+y²
Hope this helps :)