Answer
The new matrix is
[ 1....-2]
[ 1....-4]
[0....0]
Work Step by Step
You are given two matrices:
[0....-2]
[3....1]
[-4....3]
[ -1....0]
[ 2....5]
[-4....3]
Combine the two matrices by subtracting:
[0--1....-2-0]
[3-2....1-5]
[-4--4....3-3]
The new matrix is
[ 1....-2]
[ 1....-4]
[0....0]