Question

x + y - 1 - xy
plz clear my doubt​

Answer 1

Answer:

x+y-1-xy

what is your doubt?

we cannot solve this further

Answer 2

Answer:

in this we can take ( a-b)²

x+ y - 1 - xy

= ( x + y - xy ) -1

= ( x - y )² - (1)²

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