| ( | 228 | + | 56 | ) | × | 5 | = | ( | 228 | − | 56 | − | 6 | x | ) | ( | 5 | + | x | ) |
| Left side of the equation = | 228 | × | 5 | + | 56 | × | 5 |
| = | 1140 | + | 280 |
| = | 1420 |
| 1420 | = | ( | 228 | − | 56 | − | 6 | x | ) | ( | 5 | + | x | ) |
| Right side of the equation = | 228 | ( | 5 | + | x | ) | − | 56 | ( | 5 | + | x | ) | − | 6 | x | ( | 5 | + | x | ) |
| = | 228 | × | 5 | + | 228 | x | − | 56 | ( | 5 | + | x | ) | − | 6 | x | ( | 5 | + | x | ) |
| = | 1140 | + | 228 | x | − | 56 | ( | 5 | + | x | ) | − | 6 | x | ( | 5 | + | x | ) |
| = | 1140 | + | 228 | x | − | 56 | × | 5 | − | 56 | x | − | 6 | x | ( | 5 | + | x | ) |
| = | 1140 | + | 228 | x | − | 280 | − | 56 | x | − | 6 | x | ( | 5 | + | x | ) |
| = | 860 | + | 172 | x | − | 6 | x | ( | 5 | + | x | ) |
| = | 860 | + | 172 | x | − | 6 | x | × | 5 | − | 6 | x | x |
| = | 860 | + | 172 | x | − | 30 | x | − | 6 | x | x |
| = | 860 | + | 142 | x | − | 6 | x | x |
| 1420 | = | 860 | + | 142 | x | − | 6 | x | x |
| x2= | 56 3 |