Q45 of 110 Page 260

Prove that


Operating C1→aC1



Operating C1→C1+bC2+cC3



Taking (a2+b2+c2)



Operating C2→C2-bC1, C3→C3-cC3



Expanding with R3



a+b+c)


= (a2+b2+c2)(a+b+c)


Hence Proved


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