Question

what is the whole square of 2

Answer 1

Before you understand A + B Whole Square : (a + b)2 = a2 + b2 + 2ab, you are advised to read: 

How to Multiply Variables ? 
How to Multiply Polynomials ? 
What is Exponential Form ? 

How this identity of (a + b)2 = a2 + b2 + 2ab is obtained: 

Taking LHS of the identity: 
(a + b)2 

This can also be written as: 
= (a + b) (a + b) 

Multiply as we do multiplication of two binomials and we get: 
= a(a + b) + b(a + b) 
= a2 + ab + ab + b2 

Add like terms and we get: 
= a2 + 2ab + b2 

Rearrange the terms and we get: 
= a2 + b2 + 2ab 

Hence, in this way we obtain the identity i.e. (a + b)2 = a2 + b2 + 2ab 
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Answer 2

If the question is square root of then its 1.414