(3x3 Inversion)

Calculate cofactor matrics: https://www.mathworks.com/matlabcentral/answers/27891-matrix-cofactor

```
det(x) % determinent
inv(x) % inverse
eig(x) % column vectors of eigen values
[V D] = eig(x) % V=n_col eigen vectors in a matrics; D=diagnal eigen value
```

Quiz 2 Tuesday Homework 2 will open

LAA due today

assigned TA (at syllabus)

homework:

- save as pdf, do not suppress output

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