√3 + √2
X √3 - √2
-----------------------------------
- √6 - 2
+ 3 + √6
--------------------------------------
3 + 0 -2 = 1
即:(√3+√2)(√3-√2)= 1
√3 + √2
X √3 - √2
-----------------------------------
- √6 - 2
+ 3 + √6
--------------------------------------
3 + 0 -2 = 1
即:(√3+√2)(√3-√2)= 1