tentukan determinan matriks X

Jika A matriks yang berukuran 2x2 maka:

[tex]A=\left[ \begin {array}{cc} a&b\\ \noalign{\medskip}c&d\end {array} \right] \\ \\ \det(A)=ad-bc[/tex]

Jika A matriks yang berukuran 3x3 maka:

[tex]A=\left[ \begin {array}{ccc} a&b&c\\ \noalign{\medskip}d&e&f \\ \noalign{\medskip}g&h&i\end {array} \right] \\ \\ \\ \det(A)=aei-afh-bdi+bfg+cdh-ceg[/tex]