| ( | x | − | 2 | − | 1 | ) | ( | x | − | 4 | − | 6 | ) | = | 24 |
| 方程左边 = | x | ( | x | − | 4 | − | 6 | ) | − | 2 | ( | x | − | 4 | − | 6 | ) | − | 1 | ( | x | − | 4 | − | 6 | ) |
| = | x | x | − | x | × | 4 | − | x | × | 6 | − | 2 | ( | x | − | 4 | − | 6 | ) | − | 1 | ( | x | − | 4 | − | 6 | ) |
| = | x | x | − | 10 | x | − | 2 | ( | x | − | 4 | − | 6 | ) | − | 1 | ( | x | − | 4 | − | 6 | ) |
| = | x | x | − | 10 | x | − | 2 | x | + | 2 | × | 4 | + | 2 | × | 6 | − | 1 | ( | x | − | 4 | − | 6 | ) |
| = | x | x | − | 10 | x | − | 2 | x | + | 8 | + | 12 | − | 1 | ( | x | − | 4 | − | 6 | ) |
| = | x | x | − | 12 | x | + | 20 | − | 1 | ( | x | − | 4 | − | 6 | ) |
| = | x | x | − | 12 | x | + | 20 | − | 1 | x | + | 1 | × | 4 | + | 1 | × | 6 |
| = | x | x | − | 12 | x | + | 20 | − | 1 | x | + | 4 | + | 6 |
| = | x | x | − | 13 | x | + | 30 |
| x | x | − | 13 | x | + | 30 | = | 24 |