| - | 8 | x | × | 2 | ( | x | × | 2 | + | 1 | ) | × | 2 | + | 6 | x | ( | x | × | 2 | + | 1 | ) | × | 2 | + | 4 | ( | x | × | 2 | + | 1 | ) | = | 0 |
| Left side of the equation = | - | 32 | x | ( | x | × | 2 | + | 1 | ) | + | 12 | x | ( | x | × | 2 | + | 1 | ) | + | 4 | ( | x | × | 2 | + | 1 | ) |
| - | 32 | x | ( | x | × | 2 | + | 1 | ) | + | 12 | x | ( | x | × | 2 | + | 1 | ) | + | 4 | ( | x | × | 2 | + | 1 | ) | = | 0 |
| Left side of the equation = | - | 32 | x | x | × | 2 | − | 32 | x | × | 1 | + | 12 | x | ( | x | × | 2 | + | 1 | ) | + | 4 | ( | x | × | 2 | + | 1 | ) |
| = | - | 64 | x | x | − | 32 | x | + | 12 | x | ( | x | × | 2 | + | 1 | ) | + | 4 | ( | x | × | 2 | + | 1 | ) |
| = | - | 64 | x | x | − | 32 | x | + | 12 | x | x | × | 2 | + | 12 | x | × | 1 |
| = | - | 64 | x | x | − | 32 | x | + | 24 | x | x | + | 12 | x | + | 4 | ( | x | × | 2 | + | 1 | ) |
| = | - | 64 | x | x | − | 20 | x | + | 24 | x | x | + | 4 | ( | x | × | 2 | + | 1 | ) |
| = | - | 64 | x | x | − | 20 | x | + | 24 | x | x | + | 4 | x | × | 2 | + | 4 |
| = | - | 64 | x | x | − | 20 | x | + | 24 | x | x | + | 8 | x | + | 4 |
| = | - | 64 | x | x | − | 12 | x | + | 24 | x | x | + | 4 |
| - | 64 | x | x | − | 12 | x | + | 24 | x | x | + | 4 | = | 0 |
| x1= | - | 1 2 |
| x2= | 1 5 |