Possible Duplicate:
Matrix multiplications (obtaining values)
Hi,
I have a final tomorrow and it includes multiplying matrices (getting a table of values) but i do not understand how he is getting some of the numbers
something like this
suppose the matrices are
A3X4 B4X5 C5x7 D7X2
in the results table he has
A B C D A 0 60 165 134 B 0 140 110 C 0 70 D 0 A B C D A A A*B A*B*C A*B*C*D B B B*C B*C*D C C C*D D D
How is he getting 164 unders C for example? I know how he is getting the twi dimentional ones like for instance the 140 under C would be BC which is 4X5X7 = 140 but I have no idea how he is getting for the AB*C = 165
Thank you