Question:(a + b + c) এর বর্গ নিচের কোনটি? 

A `a^2 + b^2 + c^2 + 2bc + 2ca` 
B `a^2 + b^2 + c^2 + 2ab + 2bc + 2ca` 
C `a^2 + c^2 + 2bc + 2ca + 2ca` 
D `a^2 + b^2 + 2ab + 2bc + 2ca` 

+ Answer
B 

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Irin Moni

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