21 25000 | × | 21 25000 | = | 3 5000 | × | 3 5000 | x | x | + | 1 1000 | × | 1 1000 | ( | 1 | − | x | ) | ( | 1 | − | x | ) | + | 2 | × | 9 10 | × | 3 5000 | × | 3 2500 |
方程左边 = | 441 625000000 |
441 625000000 | = | 3 5000 | × | 3 5000 | x | x | + | 1 1000 | × | 1 1000 | ( | 1 | − | x | ) | ( | 1 | − | x | ) | + | 2 | × | 9 10 | × | 3 5000 | × | 3 2500 |
方程右边 = | 9 25000000 | x | x | + | 1 1000000 | ( | 1 | − | x | ) | ( | 1 | − | x | ) | + | 81 62500000 | ( | 1 | − | x | ) |
441 625000000 | = | 9 25000000 | x | x | + | 1 1000000 | ( | 1 | − | x | ) | ( | 1 | − | x | ) | + | 81 62500000 | ( | 1 | − | x | ) |
方程右边 = | 9 25000000 | x | x | + | 1 1000000 | × | 1 | ( | 1 | − | x | ) | − | 1 1000000 | x | ( | 1 | − | x | ) | + | 81 62500000 | ( | 1 | − | x | ) |
= | 9 25000000 | x | x | + | 1 1000000 | ( | 1 | − | x | ) | − | 1 1000000 | x | ( | 1 | − | x | ) | + | 81 62500000 | ( | 1 | − | x | ) |
= | 9 25000000 | x | x | + | 1 1000000 | × | 1 | − | 1 1000000 | x | − | 1 1000000 | x | ( | 1 | − | x | ) | + | 81 62500000 | ( | 1 | − | x | ) |
= | 9 25000000 | x | x | + | 1 1000000 | − | 1 1000000 | x | − | 1 1000000 | x | ( | 1 | − | x | ) | + | 81 62500000 | ( | 1 | − | x | ) |
= | 9 25000000 | x | x | + | 1 1000000 | − | 1 1000000 | x | − | 1 1000000 | x | × | 1 | + | 1 1000000 | x | x |
= | 9 25000000 | x | x | + | 1 1000000 | − | 1 1000000 | x | − | 1 1000000 | x | + | 1 1000000 | x | x | + | 81 62500000 |
= | 9 25000000 | x | x | + | 1 1000000 | − | 1 500000 | x | + | 1 1000000 | x | x | + | 81 62500000 | ( | 1 | − | x | ) |
= | 9 25000000 | x | x | + | 1 1000000 | − | 1 500000 | x | + | 1 1000000 | x | x | + | 81 62500000 | × | 1 | − | 81 62500000 |
= | 9 25000000 | x | x | + | 1 1000000 | − | 1 500000 | x | + | 1 1000000 | x | x | + | 81 62500000 | − | 81 62500000 | x |
x1= | 664991 1000000 |
x2= | 1758539 1000000 |