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I will now show you my preferred way of finding an inverse of a 3 by 3 matrix. And I actually think it's a lot more fun. And you're less likely to make careless mistakes. But if I...

In the last video we saw that if we had some line that was defined as all of the scalar multiples of sum vector-- I'll just write it like this. The scalar multiples, obviously, are any real...

Let's say we have three matrices, A, B, and C. And let's say that B and C are both m by n matrices, and that A is a, let's call it a k by m matrix. And what I want to do is...