x2-y2+2y-1 এর একটি উৎপাদক -
Solution
Correct Answer: Option B
x2 - y2 + 2y - 1
= x2 - (y2 - 2y + 1)
= x2 - (y - 1)2
= (x + y - 1) (x - y + 1)
= x2 - (y2 - 2y + 1)
= x2 - (y - 1)2
= (x + y - 1) (x - y + 1)
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