1 Answers
দেয়া আছে, x2 + 2xy - 2y - 1
= x + 2xy + y2 - y2 - 2y - 1
= x2 + 2xy + y2 - (y2 + 2y + 1)
= (x + y)2 – (y2 + 2xy 1 + 12)
= (x + y) – (y+1)2
= (x + y + y + 1 ) ( x + y - y − 1 )
= (x + 2y + 1) (x - 1) ans.
24 views
Answered