| ( | 2 | d | + | 3 2 | ) | ( | d | d | − | 2 | d | + | 5 | ) | = | ( | 2 | d | − | 2 | ) | ( | d | + | 2 | ) | ( | d | − | 1 2 | ) |
| 方程左边 = | 2 | d | ( | d | d | − | 2 | d | + | 5 | ) | + | 3 2 | ( | d | d | − | 2 | d | + | 5 | ) |
| = | 2 | d | d | d | − | 2 | d | × | 2 | d | + | 2 | d | × | 5 | + | 3 2 |
| = | 2 | d | d | d | − | 4 | d | d | + | 10 | d | + | 3 2 | ( | d | d | − | 2 | d | + | 5 | ) |
| = | 2 | d | d | d | − | 4 | d | d | + | 10 | d | + | 3 2 | d | d |
| = | 2 | d | d | d | − | 4 | d | d | + | 10 | d | + | 3 2 | d | d |
| = | 2 | d | d | d | − | 4 | d | d | + | 7 | d | + | 3 2 | d | d |
| 2 | d | d | d | − | 4 | d | d | + | 7 | d | + | 3 2 | d | d | = | ( | 2 | d | − | 2 | ) | ( | d | + | 2 | ) | ( | d | − | 1 2 | ) |
| 方程右边 = | 2 | d | ( | d | + | 2 | ) | ( | d | − | 1 2 | ) | − | 2 | ( | d | + | 2 | ) | ( | d | − | 1 2 | ) |
| = | 2 | d | d | ( | d | − | 1 2 | ) | + | 2 | d | × | 2 | ( | d | − | 1 2 | ) | − | 2 | ( | d | + | 2 | ) | ( | d | − | 1 2 | ) |
| = | 2 | d | d | ( | d | − | 1 2 | ) | + | 4 | d | ( | d | − | 1 2 | ) | − | 2 | ( | d | + | 2 | ) | ( | d | − | 1 2 | ) |
| = | 2 | d | d | d | − | 2 | d | d | × | 1 2 | + | 4 | d | ( | d | − | 1 2 | ) | − | 2 |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | ( | d | − | 1 2 | ) | − | 2 | ( | d | + | 2 | ) |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 4 | d |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 2 | d |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 2 | d |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 2 | d |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 2 | d |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 2 | d |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 1 | d |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 1 | d |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 1 | d |
| = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 5 | d |
| 2 | d | d | d | − | 4 | d | d | + | 7 | d | + | 3 2 | d | d | = | 2 | d | d | d | − | 1 | d | d | + | 4 | d | d | − | 5 | d |