How to draw this cross?

Question

The image below is used for factoring quadratic polynomial. How to draw it in Latex (only the part enclosed by the red rectangle)? Thank you.

Answer 1

Here is one way to do it:

Code:

\documentclass{article}
\usepackage{tikz}
%% https://tex.stackexchange.com/a/100272/4301
\newcommand{\Cross}{%
    \mathbin{%
        \tikz [x=2.0ex,y=2.0ex,line width=.3ex, black] \draw (0,0) -- (1,1) (0,1) -- (1,0);
    }%
}%
\begin{document}
[
    \begin{array}{r@{}c@{}l}
        2y & & 3          \
           & {}\Cross{} & \[-0.75ex]
        3y & & 5          \
    \end{array}
]
\end{document}