| ( | 2212 | + | x | ) | ( | 2212 | − | x | ) | = | 11 10 |
| Left side of the equation = | 2212 | ( | 2212 | − | x | ) | + | x | ( | 2212 | − | x | ) |
| = | 2212 | × | 2212 | − | 2212 | x | + | x | ( | 2212 | − | x | ) |
| = | 4892944 | − | 2212 | x | + | x | ( | 2212 | − | x | ) |
| = | 4892944 | − | 2212 | x | + | x | × | 2212 | − | x | x |
| = | 4892944 | − | 0 | x | − | x | x |
| 4892944 | − | 0 | x | − | x | x | = | 11 10 |