Multiplying Matrices

Multiplying matrices is a little different than adding/subtracting matrices. We must make sure that:

# columns in 1st matrix = # rows in 2nd matrix. 

Otherwise, we can't multiply them (and therefore, just write CAN'T SIMPLIFY). If we can multiply, then multiply each column element with each corresponding row element, then add them together. Repeat this process until you don't have any more columns or rows left.

This kind of problem requires a lot of practice to make perfect. If you need some extra examples I will be happy to give you some!