My professor told me to look on YouTube, lol.
I understand how to do equally sized matrices and to do something like A3x3 * B3x1 but how would you do A3x3 * B3x2?
What I mean is:
For 3x3 * 3x1 you use the same (only) column in B for each row of A.
For 3x3 * 3x3 each row of A matches a column in B.
What would you do for 3x3 * 3x2? Use column 1 or 2 of B for the third row of A or something odd with the second row of A?
Thanks in advance for any response.