a⁴+4 এর উৎপাদক কী কী?

A (a²+2a+2)(a²+2a-2)

B (a²+2a+2)(a²-2a+2)

C (a²-2a+2)(a²+2a-2)

D (a²-2a-2)(a²-2a+2)

Correct Answer: Option B

a⁴+4
=(a²)²+2.a².2+2²-4a²
=(a²+2)²-(2a)²
=(a²+2-2a)(a²+2+2a)
=(a²+2a+2)(a²-2a+2)