9

I need to type a paper for a teacher, who hasn't seen the European division method, so that she could possibly use it in her curriculum.

I need something to look like this

x^2+4x+4       Box(x+2) 
-(x^2 + 2x)
----------------
2x+4 
-(2x + 4)
-----------------
0
10

Here is one way to do this:

enter image description here

Notes:

  • The booktabs package was used to provide flexible horizontal rules.
  • The \Ph macro uses \hphantom{)} to insert a horizontal space equivalent to the closing bracket to get things all aligned.

Code:

\documentclass{article}
\usepackage{amsmath}
\usepackage{booktabs}
\usepackage{array}
\newcommand*{\Ph}{\hphantom{)}}%
\begin{document}
$\begin{array}{r@{} r@{} r r}
  x^2 &{}+4x\Ph&{}+4\Ph       &\fbox{$(x+2)$} \\
-(x^2 &{}+ 2x) &\\
\cmidrule{1-2}
      & 2x\Ph &{}+4\Ph\\
      &-(2x\Ph &{}+4) \\
\cmidrule{2-3}
      & &0\Ph
\end{array}$
\end{document}
  • Thanks but how do I get an actual box for the x+2? I really appreciate your help. My gratitude. – Person Nov 9 '12 at 1:46
  • @Person: Use \boxed{($x+2$)} with amsmath loaded. – user11232 Nov 9 '12 at 1:48
  • @HarishKumar: I was not aware of \boxed, but that seems to force the text inside the box to be in \text mode somehow even with $ $, so used \fbox instead. – Peter Grill Nov 9 '12 at 1:53
  • @PeterGrill: \boxed is defined by amsmath for mathmode. There is a similar \Aboxed in mathtools. If you use \boxed{(x+2)}, then it will be in mathmode. Don't use $. – user11232 Nov 9 '12 at 2:17
  • @HarishKumar: Thanks. I am familiar with \Aboxed form my very first question posted on TeX.SE. But, am surprised that \boxed{$(x+2)$} compiled with x in text mode -- seems like a bug? – Peter Grill Nov 9 '12 at 2:43
4

Try looking at the package polynom.sty (CTAN, TeXdoc). It can even do the division for you.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.