Hehe, I just made it yesterday.
(1) Original formula = 2 √ 2-3√2-3 √ 2+ 1+ 1.
= 2 √ 2-3√2 - 1-√2+2.
= 1√2 + 1 in-2。
(2) The original formula =4√3-2√6+2√6-2√3.
=2√3
(3) The original formula = √ 2 of 6+3 of 6 √ 2+2 √3-2 √ 3 of 3-2 of 3.
=-5√2/6+2√3/3
Don't worry, the teacher has changed,
Exactly.
Pay attention to the minus sign.