Question

What should be subtracted from x²+y²-2xy to get x²+y²?

1 point

2xy

-2xy

xy

-xy​

Answer 1

Answer:

We can get the answer from subtracting x²+y²from x²+y²-2xy.

=x²+y²-2xy -(+x²+y²)

=x²+y²-2xy-x²-y²

=x²-x²+y²-y²-2xy

=-2xy

Therefore, -2xy should be subtracted from x²+y²-2xy to get x²+y².

I hope it would be helpful for you.