( | x | - | 360 | ) | ( | 1120 | - | 2 | x | ) | = | 0 |
方程左边 = | x | ( | 1120 | - | 2 | x | ) | - | 360 | ( | 1120 | - | 2 | x | ) |
= | x | × | 1120 | - | x | × | 2 | x | - | 360 | ( | 1120 | - | 2 | x | ) |
= | 1120 | x | - | x | × | 2 | x | - | 360 | × | 1120 | + | 360 | × | 2 | x |
= | 1120 | x | - | x | × | 2 | x | - | 403200 | + | 720 | x |
= | 1840 | x | - | x | × | 2 | x | - | 403200 |
1840 | x | - | x | × | 2 | x | - | 403200 | = | 0 |