Question

What should be added to
x2+y2 to get x?+y2+2xy?
*​

Answer 1

Step-by-step explanation:

What should be added to

x²+y²to get x²+y²+2xy

let the added term be "z"

x²+y²+z=x²+y²+2xy

z=x²-x²+y²-y²+2xy

z=2xy

..hence 2xy should be added x²+y²to get x²+y²+2xy..