Question:The value of `(3.75 xx 3.75 - 2 xx 3.75 + 2.75 xx 2.75)` is : 

A `1` 
B `1.75` 
C `4.75` 
D `6.50` 

+ Answer
A 

+ Explanation
Given Exp :

`= (3.75)^2 - 2 xx 3.75 xx 2.75 + (2.75)^2`

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

`= (a-b)^2`

`= (3.75 - 2.75)^2`

`= 1^2`

`= 1`.

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Irin Moni

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