Normal
he ptBan chi can dua 2 pt ve 2 an nhu sau:pt1:[3(x+y)^2]+[(x-y)^2]+...pt2x-y)+(x+y)+[1/(x+y)]=3Rui dat (x+y):=a (x-y):=bThe la xong!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
he pt
Ban chi can dua 2 pt ve 2 an nhu sau:
pt1:[3(x+y)^2]+[(x-y)^2]+...
pt2x-y)+(x+y)+[1/(x+y)]=3
Rui dat (x+y):=a
(x-y):=b
The la xong!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!