Question 1160775
<br>
The middle column of the product matrix BA is elements (1,2), (2,2), and (3,2).<br>
Element (1,2) of BA is the sum of the products of the elements in row 1 of B and column 2 of A:<br>
{{{(1)(3)+(-1)(-1)+(-2)(3) = 3+1-6 = -2}}}<br>
Element (2,2) of BA is the sum of the products of the elements in row 2 of B and column 2 of A<br>
Element (3,2) of BA is the sum of the products of the elements in row 3 of B and column 2 of A<br>
You can do the calculations for those two.<br>