Matrix determinant & _Latex

Determinant

\[ \left |\begin{array}{cccc} 1 &6 & 9 \\ 7 &90 & f(x) \\ 9 & \psi(x) &g(x) \\ \end{array}\right| \]

$$
\left |\begin{array}{cccc}
1 &6   & 9 \\
7 &90 & f(x)  \\
9 & \psi(x) &g(x) \\
\end{array}\right|
$$

matrix

If we | replace () or [], we get a matrix.

Align Right

\[ \left (\begin{array}{rrrr} 1 &6 & 9 \\ 7 &90 & f(x) \\ 9 & \psi(x) &g(x) \\ \end{array}\right) \]

Left

\[ \left [\begin{array}{llll} 1 &6 & 9 \\ 7 &90 & f(x) \\ 9 & \psi(x) &g(x) \\ \end{array}\right] \]

& Aligned symbols.
left = L
C = Center
R & lt right =

Reference:

1. Latex output determinant, matrix equations
2. Markdown to write the Greek alphabet