( | 6 | − | x | ) | ( | 3 | − | x | ) | ( | 3 | − | x | ) | = | 0 |
方程左边 = | 6 | ( | 3 | − | x | ) | ( | 3 | − | x | ) | − | x | ( | 3 | − | x | ) | ( | 3 | − | x | ) |
= | 6 | × | 3 | ( | 3 | − | x | ) | − | 6 | x | ( | 3 | − | x | ) | − | x | ( | 3 | − | x | ) | ( | 3 | − | x | ) |
= | 18 | ( | 3 | − | x | ) | − | 6 | x | ( | 3 | − | x | ) | − | x | ( | 3 | − | x | ) | ( | 3 | − | x | ) |
= | 18 | × | 3 | − | 18 | x | − | 6 | x | ( | 3 | − | x | ) | − | x | ( | 3 | − | x | ) | ( | 3 | − | x | ) |
= | 54 | − | 18 | x | − | 6 | x | ( | 3 | − | x | ) | − | x | ( | 3 | − | x | ) | ( | 3 | − | x | ) |
= | 54 | − | 18 | x | − | 6 | x | × | 3 | + | 6 | x | x | − | x | ( | 3 | − | x | ) | ( | 3 | − | x | ) |
= | 54 | − | 18 | x | − | 18 | x | + | 6 | x | x | − | x | ( | 3 | − | x | ) | ( | 3 | − | x | ) |
= | 54 | − | 36 | x | + | 6 | x | x | − | x | ( | 3 | − | x | ) | ( | 3 | − | x | ) |
= | 54 | − | 36 | x | + | 6 | x | x | − | x | × | 3 | ( | 3 | − | x | ) | + | x | x | ( | 3 | − | x | ) |
= | 54 | − | 36 | x | + | 6 | x | x | − | x | × | 3 | × | 3 | + | x | × | 3 | x |
= | 54 | − | 36 | x | + | 6 | x | x | − | x | × | 9 | + | x | × | 3 | x | + | x |
= | 54 | − | 45 | x | + | 6 | x | x | + | x | × | 3 | x | + | x | x | ( | 3 | − | x | ) |
= | 54 | − | 45 | x | + | 6 | x | x | + | x | × | 3 | x | + | x | x | × | 3 |
54 | − | 45 | x | + | 6 | x | x | + | x | × | 3 | x | + | x | x | × | 3 | = | 0 |