eigen/doc/snippets/Tutorial_solve_multiple_rhs.cpp

Matrix3f A(3, 3);
A << 1, 2, 3, 4, 5, 6, 7, 8, 10;
Matrix<float, 3, 2> B;
B << 3, 1, 3, 1, 4, 1;
Matrix<float, 3, 2> X;
X = A.fullPivLu().solve(B);
cout << "The solution with right-hand side (3,3,4) is:" << endl;
cout << X.col(0) << endl;
cout << "The solution with right-hand side (1,1,1) is:" << endl;
cout << X.col(1) << endl;