Question

Find AB and use this result in solving the following system of equation: x-y+z=4,x-2y-2z=9,2x+y+3z=1. Matrices A and B are given below:
1 -1 1 4 -4 4
A = 1 -2 -2 B = -7 1 3
2 1 3 5 -3 -1​

Answer 1

Find AB and use this result in solving the following system of equation: x-y+z=4,x-2y-2z=9,2x+y+3z=1. Matrices A and B are given below:

1 -1 1 4 -4 4

A = 1 -2 -2 B = -7 1 3

2 1 3 5 -3 -1

Answer 2

See the above attachment for answer.