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Determinants
Cofactor expansion, properties, Cramer's rule, and geometric interpretation.
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Compute
det
(
3
2
1
4
)
\det\begin{pmatrix}3&2\\1&4\end{pmatrix}
det
(
3
1
2
4
)
.
Cofactor expansion
Your answer
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Hint
( )
x
n
√
⌫
AC
7
8
9
+
4
5
6
−
1
2
3
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0
.
a
b
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