Question

find the inverse of each matrix.
[2 -5]
9]
[5

Answer 1

\[\left[\begin{matrix}2 & -5 \\ 5 & 9\end{matrix}\right]?\]

Answer 2

\[\left[\begin{matrix}a & b \\ c & d\end{matrix}\right]^{-1}=

\frac{1}{ad-cb}\left[\begin{matrix}d & -b \\ -c & a\end{matrix}\right]\]

Answer 3

@fabo ?