| ( | x | − | 7814 | ) | ( | 7814 | + | x | ) | = | 170561 5000 |
| Left side of the equation = | x | ( | 7814 | + | x | ) | − | 7814 | ( | 7814 | + | x | ) |
| = | x | × | 7814 | + | x | x | − | 7814 | ( | 7814 | + | x | ) |
| = | 7814 | x | + | x | x | − | 7814 | × | 7814 | − | 7814 | x |
| = | 7814 | x | + | x | x | − | 61058596 | − | 7814 | x |
| = | 0 | x | + | x | x | − | 61058596 |
| 0 | x | + | x | x | − | 61058596 | = | 170561 5000 |