| ( | 2 | x | − | 3 | ) | ( | 2 | x | − | 3 | ) | + | 2 | ( | 2 | x | − | 3 | ) | − | 3 | = | 0 |
| 方程左边 = | 2 | x | ( | 2 | x | − | 3 | ) | − | 3 | ( | 2 | x | − | 3 | ) | + | 2 | ( | 2 | x | − | 3 | ) | − | 3 |
| = | 2 | x | × | 2 | x | − | 2 | x | × | 3 | − | 3 | ( | 2 | x | − | 3 | ) | + | 2 | ( | 2 | x | − | 3 | ) | − | 3 |
| = | 4 | x | x | − | 6 | x | − | 3 | ( | 2 | x | − | 3 | ) | + | 2 | ( | 2 | x | − | 3 | ) | − | 3 |
| = | 4 | x | x | − | 6 | x | − | 3 | × | 2 | x | + | 3 | × | 3 | + | 2 | ( | 2 | x | − | 3 | ) |
| = | 4 | x | x | − | 6 | x | − | 6 | x | + | 9 | + | 2 | ( | 2 | x | − | 3 | ) | − | 3 |
| = | 4 | x | x | − | 12 | x | + | 6 | + | 2 | ( | 2 | x | − | 3 | ) |
| = | 4 | x | x | − | 12 | x | + | 6 | + | 2 | × | 2 | x | − | 2 | × | 3 |
| = | 4 | x | x | − | 12 | x | + | 6 | + | 4 | x | − | 6 |
| = | 4 | x | x | − | 8 | x | + | 0 |
| 4 | x | x | − | 8 | x | = | 0 |