| z | = | 129 125 | − | 317 50 | × | 4 125 | ( | z | − | 4 125 | ) | ÷ | z | ÷ | ( | z | + | 4 125 | ) |
| 方程两边同时乘以: | z |
| z | z | = | 129 125 | z | − | 317 50 | × | 4 125 | ( | z | − | 4 125 | ) | ÷ | ( | z | + | 4 125 | ) |
| z | z | = | 129 125 | z | − | 317 50 | × | 4 125 | z | ÷ | ( | z | + | 4 125 | ) | + | 317 50 | × | 4 125 | × | 4 125 | ÷ | ( | z | + | 4 125 | ) |
| z | z | = | 129 125 | z | − | 634 3125 | z | ÷ | ( | z | + | 4 125 | ) | + | 2536 390625 | ÷ | ( | z | + | 4 125 | ) |
| 方程两边同时乘以: | ( | z | + | 4 125 | ) |
| z | z | ( | z | + | 4 125 | ) | = | 129 125 | z | ( | z | + | 4 125 | ) | − | 634 3125 | z | + | 2536 390625 |
| z | z | z | + | z | z | × | 4 125 | = | 129 125 | z | ( | z | + | 4 125 | ) | − | 634 3125 | z | + | 2536 390625 |
| z | z | z | + | z | z | × | 4 125 | = | 129 125 | z | z | + | 129 125 | z | × | 4 125 | − | 634 3125 | z | + | 2536 390625 |
| z | z | z | + | z | z | × | 4 125 | = | 129 125 | z | z | + | 516 15625 | z | − | 634 3125 | z | + | 2536 390625 |
| z | z | z | + | z | z | × | 4 125 | = | 129 125 | z | z | − | 2654 15625 | z | + | 2536 390625 |