1000 | ( | 2 | x | + | 1 | ) | ( | x | + | 1 | ) | = | 22149 20 |
方程左边 = | 1000 | × | 2 | x | ( | x | + | 1 | ) | + | 1000 | × | 1 | ( | x | + | 1 | ) |
= | 2000 | x | ( | x | + | 1 | ) | + | 1000 | ( | x | + | 1 | ) |
= | 2000 | x | x | + | 2000 | x | × | 1 | + | 1000 | ( | x | + | 1 | ) |
= | 2000 | x | x | + | 2000 | x | + | 1000 | ( | x | + | 1 | ) |
= | 2000 | x | x | + | 2000 | x | + | 1000 | x | + | 1000 | × | 1 |
= | 2000 | x | x | + | 2000 | x | + | 1000 | x | + | 1000 |
= | 2000 | x | x | + | 3000 | x | + | 1000 |
2000 | x | x | + | 3000 | x | + | 1000 | = | 22149 20 |
x1= | - | 307 200 |
x2= | 7 200 |