( | X | × | 1 | + | X | × | 2 | + | X | × | 3 | ) | ( | X | × | 2 | X | × | 4 | ) | ( | X | × | 1 | + | X | × | 5 | + | X | × | 6 | ) | = | 0 |
方程左边 = | X | × | 1 | ( | X | × | 2 | X | × | 4 | ) | ( | X | × | 1 | + | X | × | 5 | + | X | × | 6 | ) | + | X | × | 2 | ( | X | × | 2 | X | × | 4 | ) | ( | X | × | 1 | + | X | × | 5 | + | X | × | 6 | ) | + | X | × | 3 | ( | X | × | 2 | X | × | 4 | ) | ( | X | × | 1 | + | X | × | 5 | + | X | × | 6 | ) |
= | X | × | 1 | X | × | 2 | X | × | 4 | ( | X | × | 1 | + | X | × | 5 | + | X | × | 6 | ) | + | X | × | 2 | ( | X | × | 2 | X | × | 4 | ) | ( | X | × | 1 | + | X | × | 5 | + | X | × | 6 | ) | + | X |
= | X | × | 8 | X | X | ( | X | × | 1 | + | X | × | 5 | + | X | × | 6 | ) | + | X | × | 2 | ( | X | × | 2 | X | × | 4 | ) | ( | X | × | 1 | + | X | × | 5 | + | X | × | 6 | ) | + | X | × | 3 | ( | X | × | 2 | X | × | 4 | ) |
= | X | × | 8 | X | X | X | × | 1 | + | X | × | 8 | X | X | X | × | 5 |
= | X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 |
= | X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 |
= | X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 |
= | X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 |
= | X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 |
= | X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 |
= | X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 |
= | X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 |
= | X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 |
X | × | 8 | X | X | X | + | X | × | 40 | X | X | X | + | X | × | 48 | = | 0 |