| ( | 2 | + | x | ) | ( | 2 | + | x | ) | = | x | ( | x | + | 3 | ) |
| Left side of the equation = | 2 | ( | 2 | + | x | ) | + | x | ( | 2 | + | x | ) |
| = | 2 | × | 2 | + | 2 | x | + | x | ( | 2 | + | x | ) |
| = | 4 | + | 2 | x | + | x | ( | 2 | + | x | ) |
| = | 4 | + | 2 | x | + | x | × | 2 | + | x | x |
| = | 4 | + | 4 | x | + | x | x |
| 4 | + | 4 | x | + | x | x | = | x | ( | x | + | 3 | ) |
| Right side of the equation = | x | x | + | x | × | 3 |
| 4 | + | 4 | x | + | x | x | = | x | x | + | 3 | x |