Question

How to type a 3x3 determinant??

Answer 1

```
\[
\det{\bf A}=
\left|
\begin{array}{ccc}
a_{11}&a_{12}&a_{13}\\
a_{21}&a_{22}&a_{23}\\
a_{31}&a_{32}&a_{33}
\end{array}
\right|
\]
```

\[
\det{\bf A}=
\left|
\begin{array}{ccc}
a_{11}&a_{12}&a_{13}\\
a_{21}&a_{22}&a_{23}\\
a_{31}&a_{32}&a_{33}
\end{array}
\right|
\]

Answer 2

Nice!! Thanks!! How do you type that grey box?

Answer 3

```
like this
```

Answer 4

It doesn't work? :\

Answer 5

no space before the the `'s on the third line

Answer 6

`Testing ` Oh! It works!! Thanks again!!!

Answer 7

```
\checkmark
```

Answer 8

` How come your box is soooooo long in terms of its length!!! `

Answer 9

\[\checkmark\] o.O!