| - | 9 | ÷ | 5 | × | ( | x | − | 2 | ) | ( | x | − | 2 | ) | + | 5 | − | 5 | ÷ | 7 | × | x | + | 25 | ÷ | 7 | = | 0 |
| 方程左边 = | - | 9 5 | ( | x | − | 2 | ) | ( | x | − | 2 | ) | + | 5 | − | 5 7 | x | + | 25 7 |
| = | - | 9 5 | ( | x | − | 2 | ) | ( | x | − | 2 | ) | + | 60 7 | − | 5 7 | x |
| - | 9 5 | ( | x | − | 2 | ) | ( | x | − | 2 | ) | + | 60 7 | − | 5 7 | x | = | 0 |
| 方程左边 = | - | 9 5 | x | ( | x | − | 2 | ) | + | 9 5 | × | 2 | ( | x | − | 2 | ) | + | 60 7 | − | 5 7 | x |
| = | - | 9 5 | x | ( | x | − | 2 | ) | + | 18 5 | ( | x | − | 2 | ) | + | 60 7 | − | 5 7 | x |
| = | - | 9 5 | x | x | + | 9 5 | x | × | 2 | + | 18 5 | ( | x | − | 2 | ) | + | 60 7 | − | 5 7 | x |
| = | - | 9 5 | x | x | + | 18 5 | x | + | 18 5 | ( | x | − | 2 | ) | + | 60 7 | − | 5 7 | x |
| = | - | 9 5 | x | x | + | 101 35 | x | + | 18 5 | ( | x | − | 2 | ) | + | 60 7 |
| = | - | 9 5 | x | x | + | 101 35 | x | + | 18 5 | x | − | 18 5 | × | 2 | + | 60 7 |
| = | - | 9 5 | x | x | + | 101 35 | x | + | 18 5 | x | − | 36 5 | + | 60 7 |
| = | - | 9 5 | x | x | + | 227 35 | x | + | 48 35 |
| - | 9 5 | x | x | + | 227 35 | x | + | 48 35 | = | 0 |