Determinant/2x2/Example
< Determinant < 2x2
For a
2
×
2
{\displaystyle {}2\times 2}
-
matrix
M
=
(
a
b
c
d
)
,
{\displaystyle {}M={\begin{pmatrix}a&b\\c&d\end{pmatrix}}\,,}
we have
det
(
a
b
c
d
)
=
a
d
−
c
b
.
{\displaystyle \det {\begin{pmatrix}a&b\\c&d\end{pmatrix}}=ad-cb.}
-matrix
