given the matrix a=magic(3), compute its qr factorization and solve the linear system qx=b, with b=[1,2,3]^t. the solution is, approximately: in matlab

main.m
A = magic(3); % create the matrix A
b = [1; 2; 3]; % create the vector b

[Q, R] = qr(A); % compute the QR factorization of A
x = Q' * b; % solve the linear system Qx = b

% Print the solution x
disp(x);
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main.m
   -1.0000
   -0.0000
    1.0000
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