Consider the matrix A. Since A is not a square matrix the inverse does not exist.
However, %the pseudoinverse of A will exist.
A = [1 -2; 0 1; 1 0]
The command pinv) returns the pseudoinverse of the matrix A
B=pinv(A)

Use the following matrix for this activity.
B= [1 2 0]
[-1 -2 3]