Question:`(x - y)^2 = 0` এবং xy = 4 হলে x + y এর মান কত? 

A 3 
B 4 
C 7 
D 16 

+ Answer
B 

+ Explanation
`x + y = sqrt((x - y))^2 + 4xy`

          `= sqrt(0) + 4.4 = sqrt(16) = 4`

+ Report

Irin Moni

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