Need to write Math equation

[law-katakuri]

Hi there, I’m trying to make the Synthatic Division table in my notes but Idk how to, does anyone how to format it?

[blue_emperor]

$$
\begin{array}{c|rrrr}
2 & 2 & -4 & -6 & 12 \\
+ & & 4 & 0 & -12 \\
\hline
& 2 & 0 & -6 & 0\\
\end{array}
$$

source: https://stackoverflow.com/questions/50484606/synthetic-division-mathjax