Come and tell me how to do this problem. . 20 13, a finale in the senior high school mathematics seems to be
1、a+b√3=(m+n√3)？ =m？ +3n？ +2√3mn
a=m？ +3n？ ，b=2mn
2. Let m=3 and n=4, then a=57 and b=24.
3、2mn=4，mn=2
①m= 1, n=2, then a= 13.
②m=2, n= 1, then a=7.