Question 616567
[ x y z ] is a 1x3 matrix
B must have the same number of rows as this has columns. Otherwise multiplication would not be possible. So B must have 3 rows.<br>
[ l m n o p ] one a 1x5 matrix. It has, as you sould expect, the same number of rows as [ x y z ], 1. And it will have the same number of columns as B. So B must have 5 columns, too.<br>
So B has 3 rows and 5 columns. IOW: B is 3x5.