ho how to use this symobl using latex Equation editor

hi check this image i want to do the same thing on latex editor

ie: Writing Synthetic Division

Is this what you are looking for ?

\begin{array}{r|rrr}
1 & 1 & 5 & 6 \\
  &   & 1 & 6 \\
\cline{2-4}
\multicolumn{2}{r}{1} & 6 & 12
\end{array}

Conway

We are trialling the longdiv package. This might do what you need.

See http://www.codecogs.com/pages/forums/pagegen.php?id=1724