Question:x + y = a + b, ax - by =` a^2 - b^2` সমীকরণদ্বয়ের সমাধান কোনটি? 

A (a, b) 
B (-a, b) 
C (a, - b) 
D (- a, - b) 

+ Answer
A 

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Irin Moni

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