co phai vo tong co 2 duong k

toi vao wet:https://www.youtube.com/watch?v=NiS8j0Tritg
xem thj thay co 2duong vo~to^ng ma` thay duong 2 co ve pro hon chu choi thu nen k bjet bac nao pro da test tai chjne roi thj jaj thich jup toi cai vi dang me classt nay va dang muon theo nhung khi xem xong thi phan van neu 2 duong thi duong nao vip hon choi duong nao thi khung~ hon chem jo ga con co j sai sot cac nember dung chem qua tay nhe>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>[img][/img]