Find minors and cofactors of the elements `a_(11), a_(21)`in the determinant `Delta=|a_(11)a_(12)a_(13)a_(21)a_(22)a_(23)a_(31)a_(32)a_(23)|`

Explanation

To find the minors and cofactors of the elements \( a_{11} \) and \( a_{21} \) in the determinant

\[
\Delta = \begin{vmatrix}
a_{11} & a_{12} & a_{13} \\
a_{21} & a_{22} & a_{23} \\
a_{31} & a_{32} & a_{33}
\end{vmatrix}
...