1.

`|{:(sqrt(13)+sqrt(3),2sqrt(5),sqrt(5)),(sqrt(15)+sqrt(26),5,sqrt(10)),(3+sqrt(65),sqrt(15),5):}|` का मूल्यांकन किजिये ।

Answer» यहाँ `Delta=|{:(sqrt(13)+sqrt(3),2sqrt(5),sqrt(5)),(sqrt(15)+sqrt(26),5,sqrt(10)),(3+sqrt(65),sqrt(15),5):}|`
`=|{:(sqrt(13),2sqrt(5),sqrt(5)),(sqrt(15),5,sqrt(10)),(3,sqrt(15),5):}|+|{:(sqrt(3),2sqrt(5),sqrt(5)),(sqrt(26),5,sqrt(10)),(sqrt(65),sqrt(15),5):}|`
`=sqrt(5)*sqrt(5)|{:(sqrt(13),2,1),(sqrt(15),sqrt(5),sqrt(2)),(3,sqrt(3),sqrt(5)):}|+sqrt(5)*sqrt(5)|{:(sqrt(3),2,1),(sqrt(26),sqrt(5),sqrt(2)),(sqrt(65),sqrt(3),sqrt(5)):}|`
`=5|{:(sqrt(13)-2sqrt(3),2,1),(0,sqrt(5),sqrt(2)),(0,sqrt(3),sqrt(5)):}|+5|{:(sqrt(3)-sqrt(13),2,1),(0,sqrt(5),sqrt(2)),(0,sqrt(3),sqrt(5)):}|`
`=5(sqrt(13)-2sqrt(3)(5-sqrt(6))+5(sqrt(3)-ssqrt(13))(5-sqrt(6))`
`=5(5-sqrt(6))(sqrt(13)-2sqrt(3)+sqrt(3)-sqrt(13))`
`=5(5-sqrt(6))(-sqrt(3))`
`=-5(5-sqrt(6))sqrt(3)`


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