( | ( | 2 | x | + | 10 | ) | + | ( | x | + | 2 | ) | ) | ( | x | − | 1 | ) | = | ( | x | + | 2 | ) | ( | x | + | 5 | ) |
方程左边 = | ( | 2 | x | + | 10 | ) | ( | x | − | 1 | ) | + | ( | x | + | 2 | ) | ( | x | − | 1 | ) |
= | 2 | x | ( | x | − | 1 | ) | + | 10 | ( | x | − | 1 | ) | + | ( | x | + | 2 | ) | ( | x | − | 1 | ) |
= | 2 | x | x | − | 2 | x | × | 1 | + | 10 | ( | x | − | 1 | ) | + | ( | x | + | 2 | ) | ( | x | − | 1 | ) |
= | 2 | x | x | − | 2 | x | + | 10 | ( | x | − | 1 | ) | + | ( | x | + | 2 | ) | ( | x | − | 1 | ) |
= | 2 | x | x | − | 2 | x | + | 10 | x | − | 10 | × | 1 | + | ( | x | + | 2 | ) | ( | x | − | 1 | ) |
= | 2 | x | x | − | 2 | x | + | 10 | x | − | 10 | + | ( | x | + | 2 | ) | ( | x | − | 1 | ) |
= | 2 | x | x | + | 8 | x | − | 10 | + | ( | x | + | 2 | ) | ( | x | − | 1 | ) |
= | 2 | x | x | + | 8 | x | − | 10 | + | x | ( | x | − | 1 | ) | + | 2 | ( | x | − | 1 | ) |
= | 2 | x | x | + | 8 | x | − | 10 | + | x | x | − | x | × | 1 | + | 2 | ( | x | − | 1 | ) |
= | 2 | x | x | + | 7 | x | − | 10 | + | x | x | + | 2 | ( | x | − | 1 | ) |
= | 2 | x | x | + | 7 | x | − | 10 | + | x | x | + | 2 | x | − | 2 | × | 1 |
= | 2 | x | x | + | 7 | x | − | 10 | + | x | x | + | 2 | x | − | 2 |
= | 2 | x | x | + | 9 | x | − | 12 | + | x | x |
2 | x | x | + | 9 | x | − | 12 | + | x | x | = | ( | x | + | 2 | ) | ( | x | + | 5 | ) |
方程右边 = | x | ( | x | + | 5 | ) | + | 2 | ( | x | + | 5 | ) |
= | x | x | + | x | × | 5 | + | 2 | ( | x | + | 5 | ) |
= | x | x | + | 5 | x | + | 2 | x | + | 2 | × | 5 |
= | x | x | + | 5 | x | + | 2 | x | + | 10 |
= | x | x | + | 7 | x | + | 10 |
2 | x | x | + | 9 | x | − | 12 | + | x | x | = | x | x | + | 7 | x | + | 10 |