x2 − y2 + 4y − 4 এর একটি উৎপাদক-

A x + y - 2

B x + y + 2

C x - y - 2

D x - 2y + 1

Solution

Correct Answer: Option A


x²-y²+4y-4
=x²-(y²-4y+4)
=x²-(y-2)²
=(x+y-2)(x-y+2)

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