Question 863666
in solving for subtraction under matrices,you must check for their conformability.ie..they must be square matrix for the solution to be solved.
since this matrix is a 2*2 matrix,it is conformable.
\4 -7 /    \-9 4 /
\1 8 /   - \-1 5/
                 =\4-(-9)  -7-(4)/
                  \1-(-1)   8-5  / =
                                    \4+9  -7-4/
                                    \1+1   8-5/
                                                 =\13  -11/
                                                  \2   3 /