x²+y²-2xy (X-y)²+2xy-2xy (x-y)² (x-y)(x-y) 2. x²+y²+2xy (X+y)²-2xy+2xy (X+y)² (X+y)(X+y) 3. 4x²+y²-xy (2x)²+y²-xy ( 2x+y)²-4xy-xy (2x+y)²-5xy 4. x²-y² (X+y)(x-y) Reply
(X-y)²+2xy-2xy
(x-y)²
(x-y)(x-y)
2. x²+y²+2xy
(X+y)²-2xy+2xy
(X+y)²
(X+y)(X+y)
3. 4x²+y²-xy
(2x)²+y²-xy
( 2x+y)²-4xy-xy
(2x+y)²-5xy
4. x²-y²
(X+y)(x-y)