(a + b)2 = ?

A  a2- 2ab + b2  

B (a – b)2 + 4ab  

C  (a + b) (a – b)  

D (a + b)2 - 4ab  

Solution

Correct Answer: Option B

(a + b)2 = ?
 = (a - b)2 + 4ab
=  a2- 2ab + b2+4ab 
=  a2+ 2ab + b2

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