A fourth way to multiply matrices is columns of A times rows of B: AB = (column 1)(row
Chapter 1, Problem 1.4.19(choose chapter or problem)
A fourth way to multiply matrices is columns of A times rows of B: AB = (column 1)(row 1) ++ (column n)(row n) = sum of simple matrices. Give a 2 by 2 example of this important rule for matrix multiplication
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