| ( | x | − | 35 | ) | ( | x | − | 35 | ) | × | 10 | + | 100 | = | 1760 |
| 方程左边 = | x | ( | x | − | 35 | ) | × | 10 | − | 35 | ( | x | − | 35 | ) | × | 10 | + | 100 |
| = | x | ( | x | − | 35 | ) | × | 10 | − | 350 | ( | x | − | 35 | ) | + | 100 |
| = | x | x | × | 10 | − | x | × | 35 | × | 10 | − | 350 | ( | x | − | 35 | ) | + | 100 |
| = | x | x | × | 10 | − | x | × | 350 | − | 350 | ( | x | − | 35 | ) | + | 100 |
| = | x | x | × | 10 | − | 350 | x | − | 350 | x | + | 350 | × | 35 | + | 100 |
| = | x | x | × | 10 | − | 350 | x | − | 350 | x | + | 12250 | + | 100 |
| = | x | x | × | 10 | − | 700 | x | + | 12350 |
| x | x | × | 10 | − | 700 | x | + | 12350 | = | 1760 |