| 1 | + | x | = | ( | 1 | + | 3 10 | x | ) | ( | 1 | + | 2 5 | x | ) | ( | 1 | + | 1 10 | x | ) | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) |
| 方程右边 = | 1 | ( | 1 | + | 2 5 | x | ) | ( | 1 | + | 1 10 | x | ) | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 3 10 | x | ( | 1 | + | 2 5 | x | ) | ( | 1 | + | 1 10 | x | ) | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) |
| = | 1 | × | 1 | ( | 1 | + | 1 10 | x | ) | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 | × | 2 5 | x | ( | 1 | + | 1 10 | x | ) | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) |
| = | 1 | ( | 1 | + | 1 10 | x | ) | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 2 5 | x | ( | 1 | + | 1 10 | x | ) | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 3 10 |
| = | 1 | × | 1 | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 | × | 1 10 | x | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 2 5 |
| = | 1 | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 10 | x | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 2 5 | x | ( | 1 | + | 1 10 | x | ) |
| = | 1 | × | 1 | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 | × | 1 20 | x | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 10 | x | ( | 1 | + | 1 20 | x | ) |
| = | 1 | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 20 | x | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 10 | x | ( | 1 | + | 1 20 | x | ) | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) |
| = | 1 | × | 1 | ( | 1 | + | 1 2 | x | ) | + | 1 | × | 1 2 | x | ( | 1 | + | 1 2 | x | ) | + | 1 20 | x | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 10 |
| = | 1 | ( | 1 | + | 1 2 | x | ) | + | 1 2 | x | ( | 1 | + | 1 2 | x | ) | + | 1 20 | x | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 10 | x | ( | 1 | + | 1 20 | x | ) |
| = | 1 | × | 1 | + | 1 | × | 1 2 | x | + | 1 2 | x | ( | 1 | + | 1 2 | x | ) | + | 1 20 | x | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) |
| = | 1 | + | 1 2 | x | + | 1 2 | x | ( | 1 | + | 1 2 | x | ) | + | 1 20 | x | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 10 | x |
| = | 1 | + | 1 2 | x | + | 1 2 | x | × | 1 | + | 1 2 | x | × | 1 2 | x | + | 1 20 | x |
| = | 1 | + | 1 2 | x | + | 1 2 | x | + | 1 4 | x | x | + | 1 20 | x | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) |
| = | 1 | + | 1 | x | + | 1 4 | x | x | + | 1 20 | x | ( | 1 | + | 1 2 | x | ) | ( | 1 | + | 1 2 | x | ) | + | 1 10 | x |
| = | 1 | + | 1 | x | + | 1 4 | x | x | + | 1 20 | x | × | 1 | ( | 1 | + | 1 2 | x | ) | + | 1 20 | x |
| = | 1 | + | 1 | x | + | 1 4 | x | x | + | 1 20 | x | ( | 1 | + | 1 2 | x | ) | + | 1 40 | x | x |
| = | 1 | + | 1 | x | + | 1 4 | x | x | + | 1 20 | x | × | 1 | + | 1 20 | x | × | 1 2 |
| = | 1 | + | 1 | x | + | 1 4 | x | x | + | 1 20 | x | + | 1 40 | x | x | + | 1 40 |
| = | 1 | + | 21 20 | x | + | 1 4 | x | x | + | 1 40 | x | x | + | 1 40 | x | x |
| = | 1 | + | 21 20 | x | + | 1 4 | x | x | + | 1 40 | x | x | + | 1 40 | x | x |
| = | 1 | + | 21 20 | x | + | 1 4 | x | x | + | 1 40 | x | x | + | 1 40 | x | x |
| = | 1 | + | 21 20 | x | + | 1 4 | x | x | + | 1 40 | x | x | + | 1 40 | x | x |
| = | 1 | + | 21 20 | x | + | 1 4 | x | x | + | 1 40 | x | x | + | 1 40 | x | x |
| = | 1 | + | 21 20 | x | + | 1 4 | x | x | + | 1 40 | x | x | + | 1 40 | x | x |
| = | 1 | + | 21 20 | x | + | 1 4 | x | x | + | 1 40 | x | x | + | 1 40 | x | x |
| x2=0 |