Q. 15

Using properties of determinants, prove the following:

Answer :

R1R1 + bR3

taking common (1 + a2+ b2)

R2R2 – aR3

Taking common (1 + a2+ b2)

= (1+a2+b2 )2 (1- a2-b2 +2a2+2a2)

= (1+a2+b2 )2 (1+a2+b2 )

= (1+a2+b2 )3

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