Tentukan invers matriks-matriks berikut (-1 -2) ( 1 3)

Materi : Matriks
Bahasan : Invers Matriks

Langkah - langkah dan Jawaban :
[tex]A = \left[\begin{array}{ccc}-1&-2\\1&3\end{array}\right] \\ \\ |A| = 3(-1) - (-2)1 \\ \\ |A| = - 1 \\ \\ Adj(A) = \left[\begin{array}{ccc}3&2\\-1&-1\end{array}\right] \\ \\ A^{-1} = \frac{1}{|A|} Adj(A) \\ \\ A^{-1} = - 1 \left[\begin{array}{ccc}3&2\\-1&-1\end{array}\right] \\ \\ A^{-1} = \left[\begin{array}{ccc}-3&-2\\1&1\end{array}\right] [/tex]

Maaf kalo jawabannya kurang tepat