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# Find the inverse of the given 3x3 matrix.

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$$\\(MUST\space SHOW\space WORKING\space OUT)\\ Find\space the\space inverse\space of\space\\ the\space given\space 3x3\space matrix.\\ \\D=\begin{bmatrix} 1 && 2 && 1 \\ 2 && 0 && 0 \\ 0 && 0 && 2 \end{bmatrix} What\space is\space {D^-1?}$$

Sep 26, 2016

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Sep 26, 2016

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Lol, what was the point of posting this because I already figured out the answer.

If any1 wants the answer I'll post it but for now I'll wait if any1 can figure this out.

Sep 26, 2016
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Interested to see how it is worked out. I have only briefly (VERY briefly) learned about matrices back in Algebra II and I've never heard of them since.

Sep 26, 2016
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EighthMersennePrime  Sep 26, 2016
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Interesting, I'd probably have to learn a bit more about what a matrix is to understand though

Skgr136  Sep 26, 2016
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I think you could solve this using the Gaussian elimination, but I haven't fully understood how it works because I just started learning about matrices.

EighthMersennePrime  Sep 26, 2016