| ( | 2 | − | x | ) | ( | 2 | − | x | ) | ( | 2 | − | x | ) | − | 16 | ( | 2 | − | x | ) | = | 0 |
| 方程左边 = | 2 | ( | 2 | − | x | ) | ( | 2 | − | x | ) | − | x | ( | 2 | − | x | ) | ( | 2 | − | x | ) | − | 16 | ( | 2 | − | x | ) |
| = | 2 | × | 2 | ( | 2 | − | x | ) | − | 2 | x | ( | 2 | − | x | ) | − | x | ( | 2 | − | x | ) | ( | 2 | − | x | ) | − | 16 | ( | 2 | − | x | ) |
| = | 4 | ( | 2 | − | x | ) | − | 2 | x | ( | 2 | − | x | ) | − | x | ( | 2 | − | x | ) | ( | 2 | − | x | ) | − | 16 | ( | 2 | − | x | ) |
| = | 4 | × | 2 | − | 4 | x | − | 2 | x | ( | 2 | − | x | ) | − | x | ( | 2 | − | x | ) | ( | 2 | − | x | ) | − | 16 | ( | 2 | − | x | ) |
| = | 8 | − | 4 | x | − | 2 | x | ( | 2 | − | x | ) | − | x | ( | 2 | − | x | ) | ( | 2 | − | x | ) | − | 16 | ( | 2 | − | x | ) |
| = | 8 | − | 4 | x | − | 2 | x | × | 2 | + | 2 | x | x | − | x | ( | 2 | − | x | ) | ( | 2 | − | x | ) |
| = | 8 | − | 4 | x | − | 4 | x | + | 2 | x | x | − | x | ( | 2 | − | x | ) | ( | 2 | − | x | ) | − | 16 |
| = | 8 | − | 8 | x | + | 2 | x | x | − | x | ( | 2 | − | x | ) | ( | 2 | − | x | ) | − | 16 | ( | 2 | − | x | ) |
| = | 8 | − | 8 | x | + | 2 | x | x | − | x | × | 2 | ( | 2 | − | x | ) | + | x | x | ( | 2 | − | x | ) |
| = | 8 | − | 8 | x | + | 2 | x | x | − | x | × | 2 | × | 2 | + | x | × | 2 | x |
| = | 8 | − | 8 | x | + | 2 | x | x | − | x | × | 4 | + | x | × | 2 | x | + | x |
| = | 8 | − | 12 | x | + | 2 | x | x | + | x | × | 2 | x | + | x | x | ( | 2 | − | x | ) |
| = | 8 | − | 12 | x | + | 2 | x | x | + | x | × | 2 | x | + | x | x | × | 2 |
| = | 8 | − | 12 | x | + | 2 | x | x | + | x | × | 2 | x | + | x | x | × | 2 |
| = | 8 | − | 12 | x | + | 2 | x | x | + | x | × | 2 | x | + | x | x | × | 2 |
| = | - | 24 | + | 4 | x | + | 2 | x | x | + | x | × | 2 | x | + | x | x | × | 2 |
| - | 24 | + | 4 | x | + | 2 | x | x | + | x | × | 2 | x | + | x | x | × | 2 | = | 0 |