Question

(2x-y)2-(y+2)2:::::::::::::::

Answer 1

(2x - y )2 - (y + 2)2 = 4 (x - y - 1)

Explanation:

`(2x -y) 2 - ( y + 2 ) 2 = (4x -2y) -(2y + 4) \\\\`

`= 4x - 2y -2y - 4\\\\=4x - 4y - 4\\\\=4(x-y-1)`