| ( | 3 | x | − | 1 | ) | ( | 2 | x | − | 4 | ) | = | 1 |
| Left side of the equation = | 3 | x | ( | 2 | x | − | 4 | ) | − | 1 | ( | 2 | x | − | 4 | ) |
| = | 3 | x | × | 2 | x | − | 3 | x | × | 4 | − | 1 | ( | 2 | x | − | 4 | ) |
| = | 6 | x | x | − | 12 | x | − | 1 | ( | 2 | x | − | 4 | ) |
| = | 6 | x | x | − | 12 | x | − | 1 | × | 2 | x | + | 1 | × | 4 |
| = | 6 | x | x | − | 12 | x | − | 2 | x | + | 4 |
| = | 6 | x | x | − | 14 | x | + | 4 |
| 6 | x | x | − | 14 | x | + | 4 | = | 1 |