Chapter 2.1, Problem 1E

Let

$A=\left[\begin{array}{ccc}3& 2& 4\\ 1& -2& 3\\ 2& 3& 2\end{array}\right]$

(a) Find the value of $\det \left(M_{21}\right),\det \left(M_{22}\right)$ , and $\det \left(M_{23}\right)$ .

(b) Find the values of $A_{21},A_{22},$ and $A_{23}$ .

(c)Use your answers from part (b) to compute $\det \left(A\right)$ .