+1886 \(\\(MUST\space SHOW\space WORKING\space OUT)\\ Find\space the\space inverse\space of\space\\ the\space given\space 3x3\space matrix.\\ \\D=\begin{bmatrix} 1 && 2 && 1 \\ 2 && 0 && 0 \\ 0 && 0 && 2 \end{bmatrix} What\space is\space {D^-1?}\)
+1886 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.
+223 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.
+223 Interesting, I'd probably have to learn a bit more about what a matrix is to understand though
+1886 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.
