A) \[2(b\times a)\]
B) \[-2(b\times a)\]
C) \[b\times a\]
D) \[a\times b\]
Correct Answer: A
Solution :
\[(a+b)(a-b)=a\times a-a\times b+b\times a-b\times b=0\] \[a\times b=-b\times a\] and \[a\times a=0\] \[(a+b)\times (a-b)=2(b\times a)\]You need to login to perform this action.
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