1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution I'm completely lost on this one. I think the question is saying matrix A is a representation of a linear transformation, with the a11 and a21 transforming to a31, and so on for the other two columns. But I don't see how you can get that result with a12 being negative. This is all I could come up with after days of looking at this problem, and I'm just going around in circles As for the product C=BA well that's pretty straightforward. If someone can point me in the right direction it will be very much appreciated!