Question:a `in NN` হলে `a^2 + 2a + 1` কোন ধরনের সংখ্যা? 

A ঋণাত্নক 
B পূর্ণ বর্গ 
C মৌলিক 
D অমূলদ 

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B 

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Irin Moni

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