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Determinant van $$$\left[\begin{array}{cc}5 & 6\\8 & 9\end{array}\right]$$$
Gerelateerde rekenmachine: Rekenmachine voor cofactormatrix
Uw invoer
Bereken $$$\left|\begin{array}{cc}5 & 6\\8 & 9\end{array}\right|$$$.
Oplossing
De determinant van een 2x2-matrix is $$$\left|\begin{array}{cc}a & b\\c & d\end{array}\right| = a d - b c$$$.
$$$\left|\begin{array}{cc}5 & 6\\8 & 9\end{array}\right| = \left(5\right)\cdot \left(9\right) - \left(6\right)\cdot \left(8\right) = -3$$$
Antwoord
$$$\left|\begin{array}{cc}5 & 6\\8 & 9\end{array}\right| = -3$$$A
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