| ( | a | − | 2 | ) | ( | a | − | 2 | ) | ( | 1 | − | a | a | ) | = | 3 | a | a | ÷ | 4 |
| Left side of the equation = | a | ( | a | − | 2 | ) | ( | 1 | − | a | a | ) | − | 2 | ( | a | − | 2 | ) | ( | 1 | − | a | a | ) |
| = | a | a | ( | 1 | − | a | a | ) | − | a | × | 2 | ( | 1 | − | a | a | ) | − | 2 | ( | a | − | 2 | ) | ( | 1 | − | a | a | ) |
| = | a | a | × | 1 | − | a | a | a | a | − | a | × | 2 | ( | 1 | − | a | a | ) | − | 2 | ( | a | − | 2 | ) |
| = | a | a | × | 1 | − | a | a | a | a | − | a | × | 2 | × | 1 | + | a | × | 2 |
| = | a | a | × | 1 | − | a | a | a | a | − | a | × | 2 | + | a | × | 2 | a |
| = | a | a | × | 1 | − | a | a | a | a | − | 2 | a | + | a | × | 2 | a |
| = | a | a | × | 1 | − | a | a | a | a | − | 2 | a | + | a | × | 2 | a |
| = | a | a | × | 1 | − | a | a | a | a | − | 2 | a | + | a | × | 2 | a |
| = | a | a | × | 1 | − | a | a | a | a | − | 2 | a | + | a | × | 2 | a |
| = | a | a | × | 1 | − | a | a | a | a | − | 4 | a | + | a | × | 2 | a |
| = | a | a | × | 1 | − | a | a | a | a | − | 4 | a | + | a | × | 2 | a |
| = | a | a | × | 1 | − | a | a | a | a | − | 4 | a | + | a | × | 2 | a |
| a | a | × | 1 | − | a | a | a | a | − | 4 | a | + | a | × | 2 | a | = | 3 | a | a | ÷ | 4 |
| Right side of the equation = | 3 4 | a | a |
| a | a | × | 1 | − | a | a | a | a | − | 4 | a | + | a | × | 2 | a | = | 3 4 | a | a |