| ( | x | − | 12 | ) | ( | x | − | 12 | ) | = | 1737 | ÷ | 16 |
| Left side of the equation = | x | ( | x | − | 12 | ) | − | 12 | ( | x | − | 12 | ) |
| = | x | x | − | x | × | 12 | − | 12 | ( | x | − | 12 | ) |
| = | x | x | − | 12 | x | − | 12 | x | + | 12 | × | 12 |
| = | x | x | − | 12 | x | − | 12 | x | + | 144 |
| = | x | x | − | 24 | x | + | 144 |
| x | x | − | 24 | x | + | 144 | = | 1737 | ÷ | 16 |
| Right side of the equation = | 1737 16 |
| x | x | − | 24 | x | + | 144 | = | 1737 16 |