`(2 + sqrt6 )(4 + sqrt6)`

(5 + sqrt6)/(5 - sqrt6)

(6 + sqrt6)(6 - sqrt6)

The value of 5sqrt(3) + 7sqrt(2) - sqrt(6) - 23/(sqrt(2) + sqrt(3) + sqrt(6)) is:

If the area of the triangle formed by the lines x=0,y=0,3x+4y-a(a>0) is 1, then a=(A)sqrt(6)(B)2sqrt(6)(C)4sqrt(6)(D)6sqrt(2)

sqrt(6 + sqrt(6 + sqrt(6 ) ) ) ?

Compare : (i) (sqrt21)/(sqrt27)and(3sqrt2)/(2sqrt6) (ii) (3sqrt6)/(4sqrt5) and (sqrt45)/(sqrt96).