507 1000 | x | ( | 50 | + | 34 5 | x | ) | − | 493 1000 | x | ( | 40 | + | 41 5 | x | ) | = | 0 |
方程左边 = | 507 1000 | x | × | 50 | + | 507 1000 | x | × | 34 5 | x | − | 493 1000 | x | ( | 40 | + | 41 5 | x | ) |
= | 507 20 | x | + | 8619 2500 | x | x | − | 493 1000 | x | ( | 40 | + | 41 5 | x | ) |
= | 507 20 | x | + | 8619 2500 | x | x | − | 493 1000 | x | × | 40 | − | 493 1000 | x | × | 41 5 | x |
= | 507 20 | x | + | 8619 2500 | x | x | − | 493 25 | x | − | 20213 5000 | x | x |
= | 563 100 | x | + | 8619 2500 | x | x | − | 20213 5000 | x | x |
563 100 | x | + | 8619 2500 | x | x | − | 20213 5000 | x | x | = | 0 |