| 144 | ( | 1 | − | a | ) | ( | 1 | − | a | ) | = | 100 |
| 方程左边 = | 144 | × | 1 | ( | 1 | − | a | ) | − | 144 | a | ( | 1 | − | a | ) |
| = | 144 | ( | 1 | − | a | ) | − | 144 | a | ( | 1 | − | a | ) |
| = | 144 | × | 1 | − | 144 | a | − | 144 | a | ( | 1 | − | a | ) |
| = | 144 | − | 144 | a | − | 144 | a | ( | 1 | − | a | ) |
| = | 144 | − | 144 | a | − | 144 | a | × | 1 | + | 144 | a | a |
| = | 144 | − | 144 | a | − | 144 | a | + | 144 | a | a |
| = | 144 | − | 288 | a | + | 144 | a | a |
| 144 | − | 288 | a | + | 144 | a | a | = | 100 |
| a1= | 1 6 |
| a2= | 11 6 |