| ( | 1 2 | + | x | ) | x | − | ( | 1 20 | − | x | ) | × | 9 5 | × | 1 100000 | = | 0 |
| 方程左边 = | ( | 1 2 | + | x | ) | x | − | ( | 1 20 | − | x | ) | × | 9 500000 |
| ( | 1 2 | + | x | ) | x | − | ( | 1 20 | − | x | ) | × | 9 500000 | = | 0 |
| 方程左边 = | 1 2 | x | + | x | x | − | ( | 1 20 | − | x | ) | × | 9 500000 |
| = | 1 2 | x | + | x | x | − | 1 20 | × | 9 500000 | + | x | × | 9 500000 |
| = | 1 2 | x | + | x | x | − | 9 10000000 | + | x | × | 9 500000 |
| = | 250009 500000 | x | + | x | x | − | 9 10000000 |
250009 500000 | x | + | x | x | − | 9 10000000 | = | 0 |
| x1=0 | ,它是方程的增解。 |