| ( | 6 | − | x | ) | ( | 6 | − | x | ) | + | 96 | = | ( | 6 | + | x | ) | ( | 6 | + | x | ) |
| 方程左边 = | 6 | ( | 6 | − | x | ) | − | x | ( | 6 | − | x | ) | + | 96 |
| = | 6 | × | 6 | − | 6 | x | − | x | ( | 6 | − | x | ) | + | 96 |
| = | 36 | − | 6 | x | − | x | ( | 6 | − | x | ) | + | 96 |
| = | 132 | − | 6 | x | − | x | ( | 6 | − | x | ) |
| = | 132 | − | 6 | x | − | x | × | 6 | + | x | x |
| = | 132 | − | 12 | x | + | x | x |
| 132 | − | 12 | x | + | x | x | = | ( | 6 | + | x | ) | ( | 6 | + | x | ) |
| 方程右边 = | 6 | ( | 6 | + | x | ) | + | x | ( | 6 | + | x | ) |
| = | 6 | × | 6 | + | 6 | x | + | x | ( | 6 | + | x | ) |
| = | 36 | + | 6 | x | + | x | ( | 6 | + | x | ) |
| = | 36 | + | 6 | x | + | x | × | 6 | + | x | x |
| = | 36 | + | 12 | x | + | x | x |
| 132 | − | 12 | x | + | x | x | = | 36 | + | 12 | x | + | x | x |