Chapter 4, Problem 13STP

To determine

The value of given expression.

Explanation of Solution

Two matrixes can be multiplied when the value of number of rows of first matrix is equal to the number of columns of second matrix.

Example- $A=\left|\begin{array}{cc}1& 2\\ 3& 4\end{array}\right|,B=\left|\begin{array}{cc}4& 3\\ 2& 1\end{array}\right|$

Two matrixes cannot be multiplied when the value of number of rows of first matrix is not equal to the number of columns of second matrix.

Example- $A=\left|\begin{array}{cc}1& 2\\ 3& 4\end{array}\right|,B=\left|\begin{array}{cc}4& 3\\ \begin{array}{l}2\\ 3\end{array}& \begin{array}{l}1\\ 5\end{array}\end{array}\right|$