| 1 | ÷ | ( | ( | 2 | − | x | ) | ( | 2 | − | x | ) | ) | − | 1 | ÷ | x | × | x | = | 0 |
| 方程两边同时乘以: | ( | ( | 2 | − | x | ) | ( | 2 | − | x | ) | ) |
| 1 | − | 1 | ÷ | 1 | × | 1 | ( | ( | 2 | − | x | ) | ( | 2 | − | x | ) | ) | = | 0 |
| 1 | − | 1 | ÷ | 1 | × | 1 | ( | 2 | − | x | ) | ( | 2 | − | x | ) | = | 0 |
| 1 | − | 1 | ( | 2 | − | x | ) | ( | 2 | − | x | ) | = | 0 |
| 1 | − | 1 | × | 2 | ( | 2 | − | x | ) | + | 1 | x | ( | 2 | − | x | ) | = | 0 |
| 1 | − | 2 | ( | 2 | − | x | ) | + | 1 | x | ( | 2 | − | x | ) | = | 0 |
| 1 | − | 2 | × | 2 | + | 2 | x | + | 1 | x | ( | 2 | − | x | ) | = | 0 |
| 1 | − | 4 | + | 2 | x | + | 1 | x | ( | 2 | − | x | ) | = | 0 |
| - | 3 | + | 2 | x | + | 1 | x | ( | 2 | − | x | ) | = | 0 |
| - | 3 | + | 2 | x | + | 1 | x | × | 2 | − | 1 | x | x | = | 0 |
| - | 3 | + | 2 | x | + | 2 | x | − | 1 | x | x | = | 0 |
| - | 3 | + | 4 | x | − | 1 | x | x | = | 0 |