( | x | − | 60 | ) | ( | - | 100 | x | + | 10000 | ) | = | 0 |
方程左边 = | x | ( | - | 100 | x | + | 10000 | ) | − | 60 | ( | - | 100 | x | + | 10000 | ) |
= | - | x | × | 100 | x | + | x | × | 10000 | − | 60 | ( | - | 100 | x | + | 10000 | ) |
= | - | x | × | 100 | x | + | 10000 | x | + | 60 | × | 100 | x | − | 60 | × | 10000 |
= | - | x | × | 100 | x | + | 10000 | x | + | 6000 | x | − | 600000 |
= | - | x | × | 100 | x | + | 16000 | x | − | 600000 |
- | x | × | 100 | x | + | 16000 | x | − | 600000 | = | 0 |