x2-y2+2y-1 এর উৎপাদক কত?

x²-y²+2y-1 এর উৎপাদক কত?

A x+y+1

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)