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

Its A
When you multiply a constant k to a matrix, you multiply all the corresponding numbers in the matrix by k.
So 3A would be = 3 9 15 6 and 2b would be = 8 18 0 6 Now subtract it. to get your answer