| ( | 1 | + | x | ) | × | 2 | + | 1 | + | 44 100 | = | 0 |
| 方程左边 = | ( | 1 | + | x | ) | × | 2 | + | 36 25 |
| ( | 1 | + | x | ) | × | 2 | + | 36 25 | = | 0 |
| 方程左边 = | 1 | × | 2 | + | x | × | 2 | + | 36 25 |
| = | 2 | + | x | × | 2 | + | 36 25 |
| = | 86 25 | + | 2 | x |
86 25 | + | 2 | x | = | 0 |
| 2 | x | = | 0 | − | 86 25 |
| 2 | x | = | - | 86 25 |
| x | = | - | 86 25 | ÷ | 2 |
| = | - | 86 25 | × | 1 2 |
| = | - | 43 25 | × | 1 |
| x | = | - | 43 25 |
| x | = | - 1.72 |