\documentclass[a4paper,12pt]{article}
\newcommand\ds{\displaystyle}
\begin{document}

\parindent=0pt

QUESTION

Write down the order of the matrix
$\textbf{A}=\left(\begin{array}{ccc}1&-1&2\\0&2&3\end{array}\right).$

\bigskip


ANSWER

The order of \textbf{A} is $2\times 3$.




\end{document}