(sqrt(6)+sqrt(15))^2=6+15+2sqrt(90)=21+2sqrt(90)
(sqrt(2)+sqrt(19))^2=2+19+2sqrt(38)=21+2sqrt(38)
sqrt(90)>sqrt(38)
(sqrt(6)+sqrt(15))^2=6+15+2sqrt(90)=21+2sqrt(90)
(sqrt(2)+sqrt(19))^2=2+19+2sqrt(38)=21+2sqrt(38)
sqrt(90)>sqrt(38)