Given a=[0 -1 1           and B= [1  -4                 2 -1 0 ]                       0   1                                                  -3  -1] Find AB.

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When you multiply matrices, you go row by each column in second matrix, B.The first row in A is 0, -1, 1. We then multiply with first col in B - 1, 0, -3. We get - 0, 0, -3. Then, add the products and we get -3.Multiply same row by next column - -4, 1, -1. We get 0, -1, -1. Add the products = -2. Now, we have the first row for AB {-3, -2}We repeat with next row in A. {2, -1, 0}. Multiply with 1st col in B. We get - {2, 0, 0} Sum is 2. 2nd row X 2nd col = {-8, -1, 0} Sum = -9. There are 2nd row for AB.AB = [-3, -2            2, -9]