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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