급하시다면..
\begin{tabu}to 0.5\linewidth{|X[1,c]|X[1,c]|X[1,c]|X[1,c]|} \hline $x$ {\huge\textbackslash} $y$ & $0$ & $1$ & $2$ \\ \hline $0$ & $0$ & $-2$ & $-4$ \\ \hline $1$ & $1$ & $-1$ & $-3$ \\ \hline $2$ & $2$ & $0$ & $-2$ \\ \hline \end{tabu}\\
KTUG 한국 텍 사용자 그룹
급하시다면..
\begin{tabu}to 0.5\linewidth{|X[1,c]|X[1,c]|X[1,c]|X[1,c]|} \hline $x$ {\huge\textbackslash} $y$ & $0$ & $1$ & $2$ \\ \hline $0$ & $0$ & $-2$ & $-4$ \\ \hline $1$ & $1$ & $-1$ & $-3$ \\ \hline $2$ & $2$ & $0$ & $-2$ \\ \hline \end{tabu}\\