| ( | 6 | − | t | ) | ( | 6 | − | t | ) | = | 6 | × | 6 | + | ( | 6 | − | 3 | t | ) | ( | 6 | − | 3 | t | ) |
| 方程左边 = | 6 | ( | 6 | − | t | ) | − | t | ( | 6 | − | t | ) |
| = | 6 | × | 6 | − | 6 | t | − | t | ( | 6 | − | t | ) |
| = | 36 | − | 6 | t | − | t | ( | 6 | − | t | ) |
| = | 36 | − | 6 | t | − | t | × | 6 | + | t | t |
| = | 36 | − | 12 | t | + | t | t |
| 36 | − | 12 | t | + | t | t | = | 6 | × | 6 | + | ( | 6 | − | 3 | t | ) | ( | 6 | − | 3 | t | ) |
| 方程右边 = | 36 | + | ( | 6 | − | 3 | t | ) | ( | 6 | − | 3 | t | ) |
| 36 | − | 12 | t | + | t | t | = | 36 | + | ( | 6 | − | 3 | t | ) | ( | 6 | − | 3 | t | ) |
| 方程右边 = | 36 | + | 6 | ( | 6 | − | 3 | t | ) | − | 3 | t | ( | 6 | − | 3 | t | ) |
| = | 36 | + | 6 | × | 6 | − | 6 | × | 3 | t | − | 3 | t | ( | 6 | − | 3 | t | ) |
| = | 36 | + | 36 | − | 18 | t | − | 3 | t | ( | 6 | − | 3 | t | ) |
| = | 72 | − | 18 | t | − | 3 | t | ( | 6 | − | 3 | t | ) |
| = | 72 | − | 18 | t | − | 3 | t | × | 6 | + | 3 | t | × | 3 | t |
| = | 72 | − | 18 | t | − | 18 | t | + | 9 | t | t |
| = | 72 | − | 36 | t | + | 9 | t | t |
| 36 | − | 12 | t | + | t | t | = | 72 | − | 36 | t | + | 9 | t | t |