< Determinate < 2x2
Für eine
2
×
2
{\displaystyle {}2\times 2}
-
Matrix
M
=
(
a
b
c
d
)
{\displaystyle {}M={\begin{pmatrix}a&b\\c&d\end{pmatrix}}\,}
ist
det
(
a
b
c
d
)
=
a
d
−
c
b
.
{\displaystyle \det {\begin{pmatrix}a&b\\c&d\end{pmatrix}}=ad-cb.}
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