Question

Finding inverses of matrices?

Answer 1

I think I know what to do, but I'm lost on how to find the determinant.

Answer 2

do you have a 2x2 matrix ?

Answer 3

Yes

Answer 4

\[\det\left[\begin{matrix}a&b\\c&d\end{matrix}\right]=\left|\begin{matrix}a&b\\c&d\end{matrix}\right|=ad-cb\]

Answer 5

My matrix is,
[ 0 -6]
[-2 -5]

So your saying that I would subtract the 0 & -6?

Answer 6

Ah wait wait, I looked at that formula way wrong.

Answer 7

I multiply 0 * -5, then multiply -2 * -6 then subract?

Answer 8

If so then I got 12 from that