( | x | + | 3 | ) | ( | x | − | 2 | ) | − | ( | x | + | 4 | ) | × | 2 | = | 0 |
方程左边 = | x | ( | x | − | 2 | ) | + | 3 | ( | x | − | 2 | ) | − | ( | x | + | 4 | ) | × | 2 |
= | x | x | − | x | × | 2 | + | 3 | ( | x | − | 2 | ) | − | ( | x | + | 4 | ) | × | 2 |
= | x | x | − | 2 | x | + | 3 | x | − | 3 | × | 2 | − | ( | x | + | 4 | ) | × | 2 |
= | x | x | − | 2 | x | + | 3 | x | − | 6 | − | ( | x | + | 4 | ) | × | 2 |
= | x | x | + | 1 | x | − | 6 | − | ( | x | + | 4 | ) | × | 2 |
= | x | x | + | 1 | x | − | 6 | − | x | × | 2 | − | 4 | × | 2 |
= | x | x | + | 1 | x | − | 6 | − | x | × | 2 | − | 8 |
= | x | x | − | 1 | x | − | 14 |
x | x | − | 1 | x | − | 14 | = | 0 |