If $\operatorname{adj}\left[\begin{array}{ccc}1 & 0 & 2 \\ -1 & 1 & -2 \\ 0 & 2 & 1\end{array}\right]=\left[\begin{array}{ccc}5 & m & -2 \\ 1 & 1 & 0 \\ -2 & -2 & n\end{array}\right]$, then $m+n=$

A
2

B
-3

C
5

D
-5

✓ Correct answer: C

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Question

If $\operatorname{adj}\left[\begin{array}{ccc}1 & 0 & 2 \ -1 & 1 & -2 \ 0 & 2 & 1\end{array}ight]=\left[\begin{array}{ccc}5 & m & -2 \ 1 & 1 & 0 \ -2 & -2 & n\end{array}ight]$, then $m+n=$

Accepted Answer

Correct answer: C

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