To get the element in the answer at a given row and column, take that row of the first matrix and that column of the second matrix, and take the sum of the product of corresponding elements. For example, in the matrix multiplication you provided, the element in the second row and second column will be
[tex](-2*0)+(0*-1)+(-6*3)=-18[/tex]. Do this for each row of the first matrix and column of the second matrix to get the final answer:
[tex] \left[\begin{array}{cc}9&12\\-14&-18\end{array}\right] [/tex]
