| ( | 203 10 | − | x | ) | ( | 241 10 | − | x | ) | − | 78 5 | × | 78 5 | = | 0 |
| 方程左边 = | ( | 203 10 | − | x | ) | ( | 241 10 | − | x | ) | − | 6084 25 |
| ( | 203 10 | − | x | ) | ( | 241 10 | − | x | ) | − | 6084 25 | = | 0 |
| 方程左边 = | 203 10 | ( | 241 10 | − | x | ) | − | x | ( | 241 10 | − | x | ) | − | 6084 25 |
| = | 203 10 | × | 241 10 | − | 203 10 | x | − | x | ( | 241 10 | − | x | ) | − | 6084 25 |
| = | 48923 100 | − | 203 10 | x | − | x | ( | 241 10 | − | x | ) | − | 6084 25 |
| = | 24587 100 | − | 203 10 | x | − | x | ( | 241 10 | − | x | ) |
| = | 24587 100 | − | 203 10 | x | − | x | × | 241 10 | + | x | x |
| = | 24587 100 | − | 222 5 | x | + | x | x |
24587 100 | − | 222 5 | x | + | x | x | = | 0 |