(√6+√3)+(3√3+3√2)
原式=------------------------------------------------
(√6+√3)(√3+√2)
√6+√3 3(√3+√2)
=------------------------------------------- + -------------------------------------------
(√6+√3)(√3+√2) ( √6+√3)(√3+√2)
1 3
=---------------------------- + ------------------------------
√3+√2 √6+√3
√3-√2 3(√6-√3)
=---------------------------- + ------------------------------
(√3+√2 )(√3-√2) (√6+√3)(√6-√3 )
=√3-√2 + √6-√3
=√6-√2