I've been multiplying matrices already, but certainly time for me to discuss the rules for matrix multiplication.
And the interesting part is the many ways you can do it, and they all give the same answer.
And they're all important.
So matrix multiplication, and then, come inverses.
So we mentioned the inverse of a matrix.
That's a big deal.
Lots to do about inverses and how to find them.
Okay, so I'll begin with how to multiply two matrices.
First way, okay, so suppose I have a matrix A multiplying a matrix B and -- giving me a result -- well, I could call it C. A times B. Okay.
So, let me just review the rule for this entry.
