question_answer

The value of \[{{\left( a+b \right)}^{2}}-{{\left( a-b \right)}^{2}}\]is

A) \[4ab\]  

B) \[-4ab\]

C) \[2{{a}^{2}}+2{{b}^{2}}\]  

D) \[2{{a}^{2}}-2{{b}^{2}}\]

E) None of these