Q. 54.3( 3 Votes )

If A and B are tw

Answer :

AB = A ----- (i)


BA = B ------(ii)


From equation (ii)


B × (AB) = B


B2A= B


From equation (ii)


B2A = BA


B2 = B


From equation (i)


A × (BA) = A


A2B= A


From equation (i)


A2B = AB


A2 = A


Hence, A2 + B2 = A + B.


Option (C) is the correct answer.

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