| a | ( | a | + | 2 | ) | ( | 3 | a | − | 8 | ) | = | 36 |
| Left side of the equation = | a | a | ( | 3 | a | − | 8 | ) | + | a | × | 2 | ( | 3 | a | − | 8 | ) |
| = | a | a | × | 3 | a | − | a | a | × | 8 | + | a | × | 2 | ( | 3 | a | − | 8 | ) |
| = | a | a | × | 3 | a | − | a | a | × | 8 | + | a | × | 2 | × | 3 | a | − | a |
| = | a | a | × | 3 | a | − | a | a | × | 8 | + | a | × | 6 | a | − | a | × | 16 |
| a | a | × | 3 | a | − | a | a | × | 8 | + | a | × | 6 | a | − | 16 | a | = | 36 |