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gjhfdfg

  • 2 years ago

Finding inverses of matrices?

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  1. gjhfdfg
    • 2 years ago
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    I think I know what to do, but I'm lost on how to find the determinant.

  2. TuringTest
    • 2 years ago
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    do you have a 2x2 matrix ?

  3. gjhfdfg
    • 2 years ago
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    Yes

  4. TuringTest
    • 2 years ago
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    \[\det\left[\begin{matrix}a&b\\c&d\end{matrix}\right]=\left|\begin{matrix}a&b\\c&d\end{matrix}\right|=ad-cb\]

  5. gjhfdfg
    • 2 years ago
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    My matrix is, [ 0 -6] [-2 -5] So your saying that I would subtract the 0 & -6?

  6. gjhfdfg
    • 2 years ago
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    Ah wait wait, I looked at that formula way wrong.

  7. gjhfdfg
    • 2 years ago
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    I multiply 0 * -5, then multiply -2 * -6 then subract?

  8. gjhfdfg
    • 2 years ago
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    If so then I got 12 from that

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