Q. 14 A5.0( 2 Votes )

Using properties

Answer :


Applying C1 C1 - C2



Taking out (a-1) from C1



Applying C2 C2 - 3C3



Taking out (a-1) from C2



Expanding along R3


= (a-1)2 [0-0+1(a+1-2)]


= (a-1)2(a-1)


= (a-1)3


Hence, L.H.S = R.H.S ....Proved


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