F07PHF Example Program Results Solution(s) 1 2 1 -4.0000 1.0000 2 -1.0000 4.0000 3 2.0000 3.0000 4 5.0000 2.0000 Backward errors (machine-dependent) 9.9E-17 8.3E-17 Estimated forward error bounds (machine-dependent) 2.4E-14 3.2E-14