a | a | ( | 1 | + | 1 25 | a | a | ) | ( | 1 | + | 1 400 | a | a | ) | = | 3157 50 |
方程左边 = | a | a | × | 1 | ( | 1 | + | 1 400 | a | a | ) | + | a | a | × | 1 25 | a | a | ( | 1 | + | 1 400 | a | a | ) |
= | a | a | × | 1 | × | 1 | + | a | a | × | 1 | × | 1 400 | a | a | + | a | a |
= | a | a | × | 1 | + | a | a | × | 1 400 | a | a | + | a | a | × | 1 25 | a |
= | a | a | × | 1 | + | a | a | × | 1 400 | a | a | + | a | a | × | 1 25 | a |
= | a | a | × | 1 | + | a | a | × | 1 400 | a | a | + | a | a | × | 1 25 | a |
a | a | × | 1 | + | a | a | × | 1 400 | a | a | + | a | a | × | 1 25 | a | = | 3157 50 |