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