x | ( | x | − | 1 | ) | ( | x | − | 2 | ) | ( | x | − | 3 | ) | ( | x | − | 4 | ) | = | 0 |
方程左边 = | x | x | ( | x | − | 2 | ) | ( | x | − | 3 | ) | ( | x | − | 4 | ) | − | x | × | 1 | ( | x | − | 2 | ) | ( | x | − | 3 | ) | ( | x | − | 4 | ) |
= | x | x | x | ( | x | − | 3 | ) | ( | x | − | 4 | ) | − | x | x | × | 2 | ( | x | − | 3 | ) | ( | x | − | 4 | ) | − | x | × | 1 |
= | x | x | x | x | ( | x | − | 4 | ) | − | x | x | x | × | 3 | ( | x | − | 4 | ) | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |
= | x | x | x | x | x | − | x | x | x | x | × | 4 | − | x | x |