( | t | + | 4 | ) | ( | t | − | 1 | ) | ( | t | + | 1 | ) | = | ( | t | − | 5 | ) | ( | 8 | − | t | ) |
方程左边 = | t | ( | t | − | 1 | ) | ( | t | + | 1 | ) | + | 4 | ( | t | − | 1 | ) | ( | t | + | 1 | ) |
= | t | t | ( | t | + | 1 | ) | − | t | × | 1 | ( | t | + | 1 | ) | + | 4 | ( | t | − | 1 | ) | ( | t | + | 1 | ) |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | ( | t | + | 1 | ) | + | 4 | ( | t | − | 1 | ) | ( | t | + | 1 | ) |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | − | t | × | 1 | × | 1 |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | − | t | × | 1 | + | 4 |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | − | 1 | t | + | 4 |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | − | 1 | t | + | 4 |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | − | 1 | t | + | 4 |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | − | 1 | t | + | 4 |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | + | 3 | t | + | 4 |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | + | 3 | t | + | 4 |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | + | 3 | t | + | 4 |
= | t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | − | 1 | t | + | 4 |
t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | − | 1 | t | + | 4 | = | ( | t | − | 5 | ) | ( | 8 | − | t | ) |
方程右边 = | t | ( | 8 | − | t | ) | − | 5 | ( | 8 | − | t | ) |
= | t | × | 8 | − | t | t | − | 5 | ( | 8 | − | t | ) |
= | 8 | t | − | t | t | − | 5 | × | 8 | + | 5 | t |
= | 8 | t | − | t | t | − | 40 | + | 5 | t |
= | 13 | t | − | t | t | − | 40 |
t | t | t | + | t | t | × | 1 | − | t | × | 1 | t | − | 1 | t | + | 4 | = | 13 | t | − | t | t | − | 40 |