Question:`a^2 + b^2` এর সাথে কত যোগ করলে রাশিটি পূর্ণবর্গ হবে? 

A `a^2 - b^2` 
B `a^2b^2` 
C `a^2 + b^2` 
D 2ab 

+ Answer
D 

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Irin Moni

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