\[\left( {\begin{array}{*{20}{c}}
8 & { - 1} \\
{ - 34} & 6 \\
\end{array} } \right)\]
Removing the \[ \] and replacing with [tex] [/tex] delimiters:
\[\left( {\begin{array}{*{20}{c}}
8 & { - 1} \\
{ - 34} & 6 \\
\end{array} } \right)\]
Removing the \[ \] and replacing with [tex] [/tex] delimiters: