Answers

2016-03-27T18:38:11+05:30
2016-03-27T18:39:03+05:30
(A+B) X (A-B) = (A X A)-(A X B)+( BX A)-(B X B) 
                       = 0+ (B X A)+ (B X A)-0 
                       = 2(B X A).

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