x2-y2+2y-1 এর একটি উৎপাদক?

x²-y²+2y-1 এর একটি উৎপাদক?

A x+y

B x-y

C x+y-1

D x+y+1

Solution

Correct Answer: Option C

x2-y2+2y-1 = x2-(y2-2y+1) = x2 -(y-1)2 =(x+y-1)(x-y+1)