| ( | 2 | x | + | 1 | ) | ( | 2 | x | + | 1 | ) | ( | 2 | x | + | 1 | ) | = | - | 64 |
| 方程左边 = | 2 | x | ( | 2 | x | + | 1 | ) | ( | 2 | x | + | 1 | ) | + | 1 | ( | 2 | x | + | 1 | ) | ( | 2 | x | + | 1 | ) |
| = | 2 | x | × | 2 | x | ( | 2 | x | + | 1 | ) | + | 2 | x | × | 1 | ( | 2 | x | + | 1 | ) | + | 1 | ( | 2 | x | + | 1 | ) | ( | 2 | x | + | 1 | ) |
| = | 4 | x | x | ( | 2 | x | + | 1 | ) | + | 2 | x | ( | 2 | x | + | 1 | ) | + | 1 | ( | 2 | x | + | 1 | ) | ( | 2 | x | + | 1 | ) |
| = | 4 | x | x | × | 2 | x | + | 4 | x | x | × | 1 | + | 2 | x | ( | 2 | x | + | 1 | ) |
| = | 8 | x | x | x | + | 4 | x | x | + | 2 | x | ( | 2 | x | + | 1 | ) | + | 1 | ( | 2 | x | + | 1 | ) |
| = | 8 | x | x | x | + | 4 | x | x | + | 2 | x | × | 2 | x | + | 2 |
| = | 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 2 | x |
| = | 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 2 | x |
| = | 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 2 | x |
| = | 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 2 | x |
| = | 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 2 | x |
| = | 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 4 | x |
| = | 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 4 | x |
| = | 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 4 | x |
| = | 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 6 | x |
| 8 | x | x | x | + | 4 | x | x | + | 4 | x | x | + | 6 | x | = | - | 64 |
| x= | - | 5 2 |