| ( | 39 5 | ( | 25 | − | x | ) | + | 406 5 | ) | ( | 361 10 | + | 39 10 | x | ) | ÷ | 10000 | + | 1 | = | 0 |
| 方程左边 = | 39 5 | ( | 25 | − | x | ) | ( | 361 10 | + | 39 10 | x | ) | × | 1 10000 | + | 406 5 | ( | 361 10 | + | 39 10 | x | ) | × | 1 10000 | + | 1 |
| = | 39 50000 | ( | 25 | − | x | ) | ( | 361 10 | + | 39 10 | x | ) | + | 203 25000 | ( | 361 10 | + | 39 10 | x | ) | + | 1 |
| = | 39 50000 | × | 25 | ( | 361 10 | + | 39 10 | x | ) | − | 39 50000 | x | ( | 361 10 | + | 39 10 | x | ) | + | 203 25000 | ( | 361 10 | + | 39 10 | x | ) | + | 1 |
| = | 39 2000 | ( | 361 10 | + | 39 10 | x | ) | − | 39 50000 | x | ( | 361 10 | + | 39 10 | x | ) | + | 203 25000 | ( | 361 10 | + | 39 10 | x | ) | + | 1 |
| = | 39 2000 | × | 361 10 | + | 39 2000 | × | 39 10 | x | − | 39 50000 | x | ( | 361 10 | + | 39 10 | x | ) | + | 203 25000 | ( | 361 10 | + | 39 10 | x | ) | + | 1 |
| = | 14079 20000 | + | 1521 20000 | x | − | 39 50000 | x | ( | 361 10 | + | 39 10 | x | ) | + | 203 25000 | ( | 361 10 | + | 39 10 | x | ) | + | 1 |
| = | 34079 20000 | + | 1521 20000 | x | − | 39 50000 | x | ( | 361 10 | + | 39 10 | x | ) | + | 203 25000 | ( | 361 10 | + | 39 10 | x | ) |
| = | 34079 20000 | + | 1521 20000 | x | − | 39 50000 | x | × | 361 10 | − | 39 50000 | x | × | 39 10 | x | + | 203 25000 | ( | 361 10 | + | 39 10 | x | ) |
| = | 34079 20000 | + | 1521 20000 | x | − | 14079 500000 | x | − | 1521 500000 | x | x | + | 203 25000 | ( | 361 10 | + | 39 10 | x | ) |
| = | 34079 20000 | + | 11973 250000 | x | − | 1521 500000 | x | x | + | 203 25000 | ( | 361 10 | + | 39 10 | x | ) |
| = | 34079 20000 | + | 11973 250000 | x | − | 1521 500000 | x | x | + | 203 25000 | × | 361 10 | + | 203 25000 | × | 39 10 | x |
| = | 34079 20000 | + | 11973 250000 | x | − | 1521 500000 | x | x | + | 73283 250000 | + | 7917 250000 | x |
| = | 998541 500000 | + | 1989 25000 | x | − | 1521 500000 | x | x |
998541 500000 | + | 1989 25000 | x | − | 1521 500000 | x | x | = | 0 |