( | x | − | 3 | ) | ( | x | − | 3 | ) | + | ( | x | + | 3 | ) | ( | x | + | 3 | ) | ( | x | − | 1 | ) | ( | x | − | 1 | ) | = | 18 |
方程左边 = | x | ( | x | − | 3 | ) | − | 3 | ( | x | − | 3 | ) | + | ( | x | + | 3 | ) | ( | x | + | 3 | ) | ( | x | − | 1 | ) | ( | x | − | 1 | ) |
= | x | x | − | x | × | 3 | − | 3 | ( | x | − | 3 | ) | + | ( | x | + | 3 | ) | ( | x | + | 3 | ) | ( | x | − | 1 | ) | ( | x | − | 1 | ) |
= | x | x | − | 3 | x | − | 3 | x | + | 3 | × | 3 | + | ( | x | + | 3 | ) | ( | x | + | 3 | ) | ( | x | − | 1 | ) | ( | x | − | 1 | ) |
= | x | x | − | 3 | x | − | 3 | x | + | 9 | + | ( | x | + | 3 | ) | ( | x | + | 3 | ) | ( | x | − | 1 | ) | ( | x | − | 1 | ) |
= | x | x | − | 6 | x | + | 9 | + | ( | x | + | 3 | ) | ( | x | + | 3 | ) | ( | x | − | 1 | ) | ( | x | − | 1 | ) |
= | x | x | − | 6 | x | + | 9 | + | x | ( | x | + | 3 | ) | ( | x | − | 1 | ) | ( | x | − | 1 | ) | + | 3 | ( | x | + | 3 | ) | ( | x | − | 1 | ) |
= | x | x | − | 6 | x | + | 9 | + | x | x | ( | x | − | 1 | ) | ( | x | − | 1 | ) | + | x | × | 3 | ( | x | − | 1 | ) |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | ( | x | − | 1 | ) | − | x | x | × | 1 |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 6 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 3 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 3 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 3 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 3 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 3 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 3 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 3 | x | + | 9 | + | x | x | x | x | − | x | x | x |
= | x | x | − | 3 | x | + | 9 | + | x | x | x | x | − | x | x | x |