| 0 | = | ( | 12 | − | 2 | x | ) | ( | 12 | − | 2 | x | ) | x |
| Right side of the equation = | 12 | ( | 12 | − | 2 | x | ) | x | − | 2 | x | ( | 12 | − | 2 | x | ) | x |
| = | 12 | × | 12 | x | − | 12 | × | 2 | x | x | − | 2 | x | ( | 12 | − | 2 | x | ) | x |
| = | 144 | x | − | 24 | x | x | − | 2 | x | ( | 12 | − | 2 | x | ) | x |
| = | 144 | x | − | 24 | x | x | − | 2 | x | × | 12 | x | + | 2 | x | × | 2 |
| = | 144 | x | − | 24 | x | x | − | 24 | x | x | + | 4 | x | x | x |
| 0 | = | 144 | x | − | 24 | x | x | − | 24 | x | x | + | 4 | x | x | x |