Question

The inverse of the matrix \left[\begin{matrix}3 & 2 \\ 8 & 5\end{matrix}\right] ?

The discriminant is 1/-1 , so now what do I do to invert this?

Answer 1

Shouldn't this be simple?
Any suggestions? Just need the inverse of \[\left[\begin{matrix}3 & 2 \\ 8 & 5\end{matrix}\right]\]

Answer 2

is it \[\left[\begin{matrix}-5 & 2 \\ 8 & -3\end{matrix}\right]\]