Question

If $△=\left|\begin{array}{ccc}5& 3& 8\\ 2& 0& 1\\ 1& 2& 3\end{array}\right|$, white the cofactor of the element $a_{32}$.

Answer 1

$△=\left|\begin{array}{ccc}5& 3& 8\\ 2& 0& 1\\ 1& 2& 3\end{array}\right|$

$a_{32}=2$

Minor$=5\left(1\right)-2\left(8\right)$

$=-11$

Co factor$={(-1)}^{3+2}(-11)$

$=-1(-11)=11$

Answer$=11$