| x | x | + | ( | 2 | x | x | ) | ( | 2 | x | x | ) | = | ( | 2 | x | ) | ( | 2 | x | ) |
| Left side of the equation = | x | x | + | 2 | x | x | ( | 2 | x | x | ) |
| = | x | x | + | 2 | x | x | × | 2 | x | x |
| = | x | x | + | 4 | x | x | x | x |
| x | x | + | 4 | x | x | x | x | = | ( | 2 | x | ) | ( | 2 | x | ) |
| Right side of the equation = | 2 | x | ( | 2 | x | ) |
| = | 2 | x | × | 2 | x |
| = | 4 | x | x |
| x | x | + | 4 | x | x | x | x | = | 4 | x | x |
| x1= | - | √3 2 |
| x2=0 |
| x3=0 |
| x4= | √3 2 |