( | 5 | − | x | ) | ( | 5 | − | x | ) | ( | 2 | − | x | ) | = | 0 |
方程左边 = | 5 | ( | 5 | − | x | ) | ( | 2 | − | x | ) | − | x | ( | 5 | − | x | ) | ( | 2 | − | x | ) |
= | 5 | × | 5 | ( | 2 | − | x | ) | − | 5 | x | ( | 2 | − | x | ) | − | x | ( | 5 | − | x | ) | ( | 2 | − | x | ) |
= | 25 | ( | 2 | − | x | ) | − | 5 | x | ( | 2 | − | x | ) | − | x | ( | 5 | − | x | ) | ( | 2 | − | x | ) |
= | 25 | × | 2 | − | 25 | x | − | 5 | x | ( | 2 | − | x | ) | − | x | ( | 5 | − | x | ) | ( | 2 | − | x | ) |
= | 50 | − | 25 | x | − | 5 | x | ( | 2 | − | x | ) | − | x | ( | 5 | − | x | ) | ( | 2 | − | x | ) |
= | 50 | − | 25 | x | − | 5 | x | × | 2 | + | 5 | x | x | − | x | ( | 5 | − | x | ) | ( | 2 | − | x | ) |
= | 50 | − | 25 | x | − | 10 | x | + | 5 | x | x | − | x | ( | 5 | − | x | ) | ( | 2 | − | x | ) |
= | 50 | − | 35 | x | + | 5 | x | x | − | x | ( | 5 | − | x | ) | ( | 2 | − | x | ) |
= | 50 | − | 35 | x | + | 5 | x | x | − | x | × | 5 | ( | 2 | − | x | ) | + | x | x | ( | 2 | − | x | ) |
= | 50 | − | 35 | x | + | 5 | x | x | − | x | × | 5 | × | 2 | + | x | × | 5 | x |
= | 50 | − | 35 | x | + | 5 | x | x | − | x | × | 10 | + | x | × | 5 | x | + | x |
= | 50 | − | 45 | x | + | 5 | x | x | + | x | × | 5 | x | + | x | x | ( | 2 | − | x | ) |
= | 50 | − | 45 | x | + | 5 | x | x | + | x | × | 5 | x | + | x | x | × | 2 |
50 | − | 45 | x | + | 5 | x | x | + | x | × | 5 | x | + | x | x | × | 2 | = | 0 |