| ( | 2 | x | − | 26 | ) | ( | x | − | 10 | ) | = | 3 |
| Left side of the equation = | 2 | x | ( | x | − | 10 | ) | − | 26 | ( | x | − | 10 | ) |
| = | 2 | x | x | − | 2 | x | × | 10 | − | 26 | ( | x | − | 10 | ) |
| = | 2 | x | x | − | 20 | x | − | 26 | ( | x | − | 10 | ) |
| = | 2 | x | x | − | 20 | x | − | 26 | x | + | 26 | × | 10 |
| = | 2 | x | x | − | 20 | x | − | 26 | x | + | 260 |
| = | 2 | x | x | − | 46 | x | + | 260 |
| 2 | x | x | − | 46 | x | + | 260 | = | 3 |