a4+4 এর উৎপাদক কত?
A (a2+2a+2)(a2-2a+2)
B (a2-2a-2) (a2-2a+2)
C (a2-2a+2)(a2-2a+2)
D (a2+2a+4) (a2-2a+4)
Correct Answer: Option A
(a2)2+22+2.a2.2-4a2
=(a2+2)2-(2a)2
=(a2+2a+2)(a2-2a+2)
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