VietTUG.org - old forum

id = 4190, parent = 4189, thread = 4109, catid = 5, locked = 0, moved = 0,
userid = duonggvt, ip = 117.2.12.118, time = 2007/11/28 (1196203969) ,
subject = Re:em chao cac Anh ah!, hits = 0, karma = 0+0-,
CÓ 2 cách:
C1: Thay \frac{p^3}{27} bởi \dfrac{p^3}{27}
C2: Đặt \displaystyle ngay sau \[ .Cụ thể là:
\[
\displaystyle
\left
\begin{array}{ll}
u+v = -q & \\
u^3 + v^3 = \frac{p^3}{27} & \\
\end{arry}
\right.
\]