6-根号(3/2)-根号(2/3)
=6-根号6/2-根号6/3
=6-5根号6/6
=根号6(根号6-5/6)
6-3/根号2-2/根号3
=6-3根号2/2-2根号3/3
=(36-9根号2-4根号3)/6