Question

Given the following matrices, find 3A - 2B. (Hint: find 3A and 2B first and then subtract.)
A= [1 3] B=[4 9] [ 5 -2 1] [-1 2 1
[ 5 2] [0 3] C= [ 0 -8 6] D= [6 -6 4
[-4 4 -4] [2 -8 3

Answer 1

so...multiply A by three, which means you are multiplying each index by 3, and do almost the same thing for B, so you get two new matrices C and D, and C-D is subtracting all the little indicies. you should get a 2 by 2 matrix, i'm not sure what the other fellow was looking at

Answer 2

so what would be the answer

Answer 3

uhm....[-5, -9], [15, -2]