1:根号27-根号6分之根号2
2:(根号3-根号2)(根号2-根号3)+6倍根号3分之2
√27-√2/√6=√3X9-√2X√6/6
=3√3-√12/6
=3√3-√3X4/6
=3√3-√3/3
=8√3/3
(√3-2)(√2-√3)+2/6√3
=-(√2-√3))(√2-√3))+1/3√3
=-4+2√6-3+√3/3X3
=-7+2√6+√3/9