Determinant
Defination - It is rectangular array of equal number of rows and columns.
It is always evaluated for square matrix only.
It always gives some value.
Representation of \[2\times 2\] determinant
Determinant of a \[2\times 2\] matrix \[\begin{bmatrix}a&b\\c&d\end{bmatrix}\] can be representated as \[ \begin{vmatrix}a&b\\c&d\end{vmatrix}\].
Evaluation of \[2\times 2\] determinant \[ \begin{vmatrix}a&b\\c&d\end{vmatrix}\]=\[ ad-bc\]
Example \[ \begin{vmatrix}5&6\\2&8\end{vmatrix}\]=40-12=28
