Calculate det(A), det(B), and det(AB) for the matrices
A=\left[\begin{array}{rr}1 & 2 \\-1 & 1\end{array}\right] \quad \text { and } \quad B=\left[\begin{array}{rr}2 & 3 \\1 & -1\end{array}\right].
Calculate det(A), det(B), and det(AB) for the matrices
A=\left[\begin{array}{rr}1 & 2 \\-1 & 1\end{array}\right] \quad \text { and } \quad B=\left[\begin{array}{rr}2 & 3 \\1 & -1\end{array}\right].