Chuong trinh Ham phan lop 
So nhom    2
So bien    2
 Ham phan lop   1
      Hang so    Cac he so
    -440.907     156.383      63.345
 Ham phan lop   2
      Hang so    Cac he so
    -291.876     127.597      51.352
 Nhom   1
    1       1
    2       1
    3       1
    4       1
 Nhom   2
    1       2
    2       2
    3       2