fig004_div.pgf

% (c) 2012 Dimitrios Vrettos - d.vrettos@gmail.com
\begin{tikzpicture}[font=\small]
\pgfsetmatrixrowsep{2mm}

\matrix  (a) [matrix of  nodes, anchor=south, minimum width=9mm, text depth=1mm]{
$3x^4$&$-4x^3$&$+0x^2$&$+5x$&$-1$ &$3x^2$&$+0x$&$-1$\\
$-3x^4$&$-0x^3$&$+x^2$&&&$x^2$\\};

 \draw(a-1-6.north west)--(a-2-6.south west);
\draw(a-1-6.south west)--(a-1-8.south east);

\begin{scope}[->,red, dashed]
 \draw (a-1-7.south) -- (a-2-6.east);
  \draw (a-2-6.west) -- (a-2-3.east);
 \end{scope}

\end{tikzpicture}