| ( | 6 | a | + | 7 | ) | ( | 6 | a | + | 7 | ) | ( | 3 | a | + | 4 | ) | ( | a | + | 1 | ) | = | 1 |
| 方程左边 = | 6 | a | ( | 6 | a | + | 7 | ) | ( | 3 | a | + | 4 | ) | ( | a | + | 1 | ) | + | 7 | ( | 6 | a | + | 7 | ) | ( | 3 | a | + | 4 | ) | ( | a | + | 1 | ) |
| = | 6 | a | × | 6 | a | ( | 3 | a | + | 4 | ) | ( | a | + | 1 | ) | + | 6 | a | × | 7 | ( | 3 | a | + | 4 | ) | ( | a | + | 1 | ) | + | 7 |
| = | 36 | a | a | ( | 3 | a | + | 4 | ) | ( | a | + | 1 | ) | + | 42 | a | ( | 3 | a | + | 4 | ) | ( | a | + | 1 | ) | + | 7 | ( | 6 | a | + | 7 | ) | ( | 3 | a | + | 4 | ) |
| = | 36 | a | a | × | 3 | a | ( | a | + | 1 | ) | + | 36 | a | a | × | 4 | ( | a | + | 1 | ) | + | 42 |
| = | 108 | a | a | a | ( | a | + | 1 | ) | + | 144 | a | a | ( | a | + | 1 | ) | + | 42 | a | ( | 3 | a | + | 4 | ) |
| = | 108 | a | a | a | a | + | 108 | a | a | a | × | 1 | + | 144 | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| = | 108 | a | a | a | a | + | 108 | a | a | a | + | 144 | a | a |
| a1= | - | 3 2 |
| a2= | - | 5 6 |