( | a | + | 3 | ) | ( | a | + | 4 | ) | ( | a | + | 5 | ) | = | 0 |
方程左边 = | a | ( | a | + | 4 | ) | ( | a | + | 5 | ) | + | 3 | ( | a | + | 4 | ) | ( | a | + | 5 | ) |
= | a | a | ( | a | + | 5 | ) | + | a | × | 4 | ( | a | + | 5 | ) | + | 3 | ( | a | + | 4 | ) | ( | a | + | 5 | ) |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | ( | a | + | 5 | ) | + | 3 | ( | a | + | 4 | ) | ( | a | + | 5 | ) |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | a | × | 4 | × | 5 |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | a | × | 20 | + | 3 |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | 20 | a | + | 3 |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | 20 | a | + | 3 |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | 20 | a | + | 3 |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | 20 | a | + | 3 |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | 35 | a | + | 3 |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | 35 | a | + | 3 |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | 35 | a | + | 3 |
= | a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | 47 | a | + | 3 |
a | a | a | + | a | a | × | 5 | + | a | × | 4 | a | + | 47 | a | + | 3 | = | 0 |