pre calc
posted by chrissy .
Find AB using matrix multiplication
A= 1 0 2
4 1 1
2 0 1
B= 2 1 0
1 0 2
4 3 1

at the bottom of this page you will find a good explanation of matrix multiplication using 2 3by3 matrices.
http://www.purplemath.com/modules/mtrxmult.htm
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