| ( | x | − | 11 2 | ) | ( | x | − | 148 | ) | − | 31 2 | × | 31 2 | = | 0 |
| 方程左边 = | ( | x | − | 11 2 | ) | ( | x | − | 148 | ) | − | 961 4 |
| ( | x | − | 11 2 | ) | ( | x | − | 148 | ) | − | 961 4 | = | 0 |
| 方程左边 = | x | ( | x | − | 148 | ) | − | 11 2 | ( | x | − | 148 | ) | − | 961 4 |
| = | x | x | − | x | × | 148 | − | 11 2 | ( | x | − | 148 | ) | − | 961 4 |
| = | x | x | − | 148 | x | − | 11 2 | x | + | 11 2 | × | 148 | − | 961 4 |
| = | x | x | − | 148 | x | − | 11 2 | x | + | 814 | − | 961 4 |
| = | x | x | − | 307 2 | x | + | 2295 4 |
| x | x | − | 307 2 | x | + | 2295 4 | = | 0 |