| ( | x | − | 3 | ) | ( | x | − | 2 | ) | ( | x | + | 4 | ) | ( | x | + | 5 | ) | − | 60 | = | 0 |
| 方程左边 = | x | ( | x | − | 2 | ) | ( | x | + | 4 | ) | ( | x | + | 5 | ) | − | 3 | ( | x | − | 2 | ) | ( | x | + | 4 | ) | ( | x | + | 5 | ) | − | 60 |
| = | x | x | ( | x | + | 4 | ) | ( | x | + | 5 | ) | − | x | × | 2 | ( | x | + | 4 | ) | ( | x | + | 5 | ) | − | 3 | ( | x | − | 2 | ) | ( | x | + | 4 | ) | ( | x | + | 5 | ) |
| = | x | x | x | ( | x | + | 5 | ) | + | x | x | × | 4 | ( | x | + | 5 | ) | − | x | × | 2 | ( | x | + | 4 | ) | ( | x | + | 5 | ) |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | ( | x | + | 5 | ) |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| = | x | x | x | x | + | x | x | x | × | 5 | + | x | x | × | 4 | x |
| x1=-3 |
| x2=1 |