Answer:
13
Step-by-step explanation:
[tex]\text{determinant of A} =\begin{vmatrix}4&-7\\ 3&-2\end{vmatrix}[/tex]
[tex]\text{determinant of A} =\left( 4\times \left( -2\right) \right) -\left( 3\times \left( -7\right) \right)[/tex]
[tex]\text{determinant of A} =-8+21=13[/tex]
