SOLUTION: Find DE if D=[-2 4 6][5 -7 1]and E=[1 -2][0 4][-3 4] A. [-20 44][8 -42] B. [-2 -10][0 -28][-18 -4] C. [-20 8][44 -42] D. [-2 0 -18][-10 -28 -4] Thank you for your help!!!

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: Find DE if D=[-2 4 6][5 -7 1]and E=[1 -2][0 4][-3 4] A. [-20 44][8 -42] B. [-2 -10][0 -28][-18 -4] C. [-20 8][44 -42] D. [-2 0 -18][-10 -28 -4] Thank you for your help!!!       Log On


   

Question 388474: Find DE if D=[-2 4 6][5 -7 1]and E=[1 -2][0 4][-3 4]
A. [-20 44][8 -42]
B. [-2 -10][0 -28][-18 -4]
C. [-20 8][44 -42]
D. [-2 0 -18][-10 -28 -4]
Thank you for your help!!!
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Answer by Jk22(389) About Me  (Show Source):
You can put this solution on YOUR website!
since it is the multiplication of a 2x3 times 3x2 matrices, the result should be 2x2, hence A or C.
The elem. 11 is -2-3*6=-20, the element 12 is 4+16+24=44, hence the solution is :

A.