x2 − y2 + 2y − 1 এর একটি উৎপাদক-

A x + y + 1

B x + y - 1

C x - y - 1

D x - 2y + 1

Solution

Correct Answer: Option B

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

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