Question

a + b whole square ​

Answer 1

Answer:

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 

Step-by-step explanation:

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