Question:The value of ` (2.75 xx 2.75 xx 2.75 -2.25 xx 2.25 xx 2.25)/(2.75 xx 2.75 + 2.75 xx 2.25 + 2.25 + 2.25)` is : 

A `0.30` 
B `0.50` 
C `  3` 
D `5` 

+ Answer
B 

+ Explanation
Given Exp :

`((2.75)^3 - (2.25)^3)/((2.75)^2 + 2.75 xx 2.75 + ( 2.25)^2)`

`= ((a^3 - b^3)/(a^2 + ab + b^2))`

`= (a - b)`

`= (2.75 - 2.25)`

`= 0.50`

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Irin Moni

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