( | x | − | 22 | ) | ( | 160 | + | 40 | ( | 38 | − | x | ) | ) | = | 0 |
方程左边 = | x | ( | 160 | + | 40 | ( | 38 | − | x | ) | ) | − | 22 | ( | 160 | + | 40 | ( | 38 | − | x | ) | ) |
= | x | × | 160 | + | x | × | 40 | ( | 38 | − | x | ) | − | 22 | ( | 160 | + | 40 | ( | 38 | − | x | ) | ) |
= | 160 | x | + | x | × | 40 | × | 38 | − | x | × | 40 | x | − | 22 | ( | 160 | + | 40 | ( | 38 | − | x | ) | ) |
= | 160 | x | + | x | × | 1520 | − | x | × | 40 | x | − | 22 | ( | 160 | + | 40 | ( | 38 | − | x | ) | ) |
= | 1680 | x | − | x | × | 40 | x | − | 22 | ( | 160 | + | 40 | ( | 38 | − | x | ) | ) |
= | 1680 | x | − | x | × | 40 | x | − | 22 | × | 160 | − | 22 | × | 40 | ( | 38 | − | x | ) |
= | 1680 | x | − | x | × | 40 | x | − | 3520 | − | 880 | ( | 38 | − | x | ) |
= | 1680 | x | − | x | × | 40 | x | − | 3520 | − | 880 | × | 38 | + | 880 | x |
= | 1680 | x | − | x | × | 40 | x | − | 3520 | − | 33440 | + | 880 | x |
= | 2560 | x | − | x | × | 40 | x | − | 36960 |
2560 | x | − | x | × | 40 | x | − | 36960 | = | 0 |