( | 5 | − | 4 5 | x | ) | ( | 24 5 | + | 3 5 | x | ) | = | ( | 32 5 | − | 4 5 | x | ) | × | 3 5 | x |
方程左边 = | 5 | ( | 24 5 | + | 3 5 | x | ) | − | 4 5 | x | ( | 24 5 | + | 3 5 | x | ) |
= | 5 | × | 24 5 | + | 5 | × | 3 5 | x | − | 4 5 | x | ( | 24 5 | + | 3 5 | x | ) |
= | 24 | + | 3 | x | − | 4 5 | x | ( | 24 5 | + | 3 5 | x | ) |
= | 24 | + | 3 | x | − | 4 5 | x | × | 24 5 | − | 4 5 | x | × | 3 5 | x |
= | 24 | + | 3 | x | − | 96 25 | x | − | 12 25 | x | x |
= | 24 | − | 21 25 | x | − | 12 25 | x | x |
24 | − | 21 25 | x | − | 12 25 | x | x | = | ( | 32 5 | − | 4 5 | x | ) | × | 3 5 | x |
方程右边 = | 32 5 | × | 3 5 | x | − | 4 5 | x | × | 3 5 | x |
= | 96 25 | x | − | 12 25 | x | x |
24 | − | 21 25 | x | − | 12 25 | x | x | = | 96 25 | x | − | 12 25 | x | x |