A) \[AB=BA\]
B) Either\[A=O\]or\[B=O\]
C) Either\[A=I\]or\[B=I\]
D) \[A=B\]
Correct Answer: A
Solution :
Given, \[{{A}^{2}}-{{B}^{2}}=(A-B)(A+B)\] \[\Rightarrow \] \[{{A}^{2}}-{{B}^{2}}={{A}^{2}}+AB-BA-{{B}^{2}}\] \[\therefore \]Above relation will hold always, if\[AB=BA\].You need to login to perform this action.
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