Complete the proof.
Drag and drop the expression to correctly complete the proof of the polynomial identity (x−y)2+4xy=(x+y)2.
![Complete the proof Drag and drop the expression to correctly complete the proof of the polynomial identity xy24xyxy2 class=](https://us-static.z-dn.net/files/de3/eb6e41340966233d966476c33c85c5c8.png)