A) \[2AB\]
B) \[2BA\]
C) \[A+B\]
D) \[AB\]
Correct Answer: C
Solution :
We have \[AB=B\]and \[BA=A\]. Therefore \[{{A}^{2}}+{{B}^{2}}=AA+BB=A(BA)+B(AB)\] \[=(AB)A+(BA)B=BA+AB=A+B\], \[(\because \,\,AB=B\] and \[BA=A)\].You need to login to perform this action.
You will be redirected in
3 sec