( | - | 2 | x | − | 2 | ) | ( | - | 2 | x | − | 2 | ) | + | ( | 1 | − | x | ) | ( | 1 | − | x | ) | = | 16 | ÷ | 5 |
方程左边 = | - | 2 | x | ( | - | 2 | x | − | 2 | ) | − | 2 | ( | - | 2 | x | − | 2 | ) | + | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
= | 2 | x | × | 2 | x | + | 2 | x | × | 2 | − | 2 | ( | - | 2 | x | − | 2 | ) | + | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
= | 4 | x | x | + | 4 | x | − | 2 | ( | - | 2 | x | − | 2 | ) | + | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
= | 4 | x | x | + | 4 | x | + | 2 | × | 2 | x | + | 2 | × | 2 | + | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
= | 4 | x | x | + | 4 | x | + | 4 | x | + | 4 | + | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
= | 4 | x | x | + | 8 | x | + | 4 | + | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
= | 4 | x | x | + | 8 | x | + | 4 | + | 1 | ( | 1 | − | x | ) | − | x | ( | 1 | − | x | ) |
= | 4 | x | x | + | 8 | x | + | 4 | + | 1 | × | 1 | − | 1 | x | − | x | ( | 1 | − | x | ) |
= | 4 | x | x | + | 8 | x | + | 4 | + | 1 | − | 1 | x | − | x | ( | 1 | − | x | ) |
= | 4 | x | x | + | 7 | x | + | 5 | − | x | ( | 1 | − | x | ) |
= | 4 | x | x | + | 7 | x | + | 5 | − | x | × | 1 | + | x | x |
= | 4 | x | x | + | 6 | x | + | 5 | + | x | x |
4 | x | x | + | 6 | x | + | 5 | + | x | x | = | 16 | ÷ | 5 |
方程右边 = | 16 5 |
4 | x | x | + | 6 | x | + | 5 | + | x | x | = | 16 5 |
x1= | - | 3 5 |
x2= | - | 3 5 |