( | 1 | ÷ | 1 2 | × | x | + | 1 | ) | ( | 1 | ÷ | 1 2 | × | x | + | 1 | ) | = | 0 |
方程左边 = | 1 | ÷ | 1 2 | × | x | ( | 1 | ÷ | 1 2 | × | x | + | 1 | ) | + | 1 | ( | 1 | ÷ | 1 2 | × | x | + | 1 | ) |
= | 2 | x | ( | 1 | ÷ | 1 2 | × | x | + | 1 | ) | + | 1 | ( | 1 | ÷ | 1 2 | × | x | + | 1 | ) |
= | 2 | x | × | 1 | ÷ | 1 2 | × | x | + | 2 | x | × | 1 | + | 1 | ( | 1 | ÷ | 1 2 | × | x | + | 1 | ) |
= | 4 | x | x | + | 2 | x | + | 1 | ( | 1 | ÷ | 1 2 | × | x | + | 1 | ) |
= | 4 | x | x | + | 2 | x | + | 1 | × | 1 | ÷ | 1 2 | × | x | + | 1 | × | 1 |
= | 4 | x | x | + | 2 | x | + | 2 | x | + | 1 |
= | 4 | x | x | + | 4 | x | + | 1 |
4 | x | x | + | 4 | x | + | 1 | = | 0 |
x1= | - | 1 2 |
x2= | - | 1 2 |