Q15 of 256 Page 7

Prove the following identities:

L.H.S =


Applying, R1→R1 + R2 + R3, we get,



Taking (a + b + c) common we get,



Applying C2→C2 – C1 and C3→C3 – C1, we get,




= (a + b + c)3 = R.H.S


Hence, proved.


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