If A = ![\left[\begin{array}{ccc}1&2&-1\\-1&1&-2\\2&-1&1\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%26amp%3B2%26amp%3B-1%5C%5C-1%26amp%3B1%26amp%3B-2%5C%5C2%26amp%3B-1%26amp%3B1%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}1&2&-1\\-1&1&-2\\2&-1&1\end{array}\right]")
,then det (adj (adj A)) is
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Sorry I can't understand which type of question is this.
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