X | − | 2 | ( | X | − | 4 | ( | X | − | 1 | ) | ) | − | 8 | = | 0 |
方程左边 = | X | − | 2 | X | + | 2 | × | 4 | ( | X | − | 1 | ) | − | 8 |
= | X | − | 2 | X | + | 8 | ( | X | − | 1 | ) | − | 8 |
= | - | 1 | X | + | 8 | ( | X | − | 1 | ) | − | 8 |
= | - | 1 | X | + | 8 | X | − | 8 | × | 1 | − | 8 |
= | - | 1 | X | + | 8 | X | − | 8 | − | 8 |
= | 7 | X | − | 16 |
7 | X | − | 16 | = | 0 |
7 | X | = | 0 | + | 16 |
7 | X | = | 16 |
X | = | 16 | ÷ | 7 |
= | 16 | × | 1 7 |
X | = | 16 7 |
X | = | 2.285714 |