| ( | x | + | 1 4 | ) | ( | x | + | 1 4 | ) | = | 16 | ÷ | 9 |
| 方程左边 = | x | ( | x | + | 1 4 | ) | + | 1 4 | ( | x | + | 1 4 | ) |
| = | x | x | + | x | × | 1 4 | + | 1 4 | ( | x | + | 1 4 | ) |
| = | x | x | + | 1 4 | x | + | 1 4 | x | + | 1 4 | × | 1 4 |
| = | x | x | + | 1 4 | x | + | 1 4 | x | + | 1 16 |
| = | x | x | + | 1 2 | x | + | 1 16 |
| x | x | + | 1 2 | x | + | 1 16 | = | 16 | ÷ | 9 |
| 方程右边 = | 16 9 |
| x | x | + | 1 2 | x | + | 1 16 | = | 16 9 |
| x1= | - | 19 12 |
| x2= | 13 12 |