anonymous
  • anonymous
Finding inverses of matrices?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
I think I know what to do, but I'm lost on how to find the determinant.
TuringTest
  • TuringTest
do you have a 2x2 matrix ?
anonymous
  • anonymous
Yes

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TuringTest
  • TuringTest
\[\det\left[\begin{matrix}a&b\\c&d\end{matrix}\right]=\left|\begin{matrix}a&b\\c&d\end{matrix}\right|=ad-cb\]
anonymous
  • anonymous
My matrix is, [ 0 -6] [-2 -5] So your saying that I would subtract the 0 & -6?
anonymous
  • anonymous
Ah wait wait, I looked at that formula way wrong.
anonymous
  • anonymous
I multiply 0 * -5, then multiply -2 * -6 then subract?
anonymous
  • anonymous
If so then I got 12 from that

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