| ( | 415 | − | x | ) | ÷ | ( | 415 | x | ( | x | − | 1 | ) | ) | = | 153 100000 |
| 方程两边同时乘以: | ( | 415 | x | ( | x | − | 1 | ) | ) |
| ( | 415 | − | x | ) | = | 153 100000 | ( | 415 | x | ( | x | − | 1 | ) | ) |
| 415 | − | x | = | 153 100000 | ( | 415 | x | ( | x | − | 1 | ) | ) |
| 415 | − | x | = | 153 100000 | × | 415 | x | ( | x | − | 1 | ) |
| 415 | − | x | = | 12699 20000 | x | ( | x | − | 1 | ) |
| 415 | − | x | = | 12699 20000 | x | x | − | 12699 20000 | x | × | 1 |
| 415 | − | x | = | 12699 20000 | x | x | − | 12699 20000 | x |
| x1= | - | √668459271 1000 |
| x2= | √639060813 1000 |