| ( | 1950 | − | 3973 20 | x | ) | ( | 950 | − | 3973 20 | x | ) | = | 950 | × | 950 |
| Left side of the equation = | 1950 | ( | 950 | − | 3973 20 | x | ) | − | 3973 20 | x | ( | 950 | − | 3973 20 | x | ) |
| = | 1950 | × | 950 | − | 1950 | × | 3973 20 | x | − | 3973 20 | x | ( | 950 | − | 3973 20 | x | ) |
| = | 1852500 | − | 774735 2 | x | − | 3973 20 | x | ( | 950 | − | 3973 20 | x | ) |
| = | 1852500 | − | 774735 2 | x | − | 3973 20 | x | × | 950 | + | 3973 20 | x | × | 3973 20 | x |
| = | 1852500 | − | 774735 2 | x | − | 377435 2 | x | + | 15784729 400 | x | x |
| = | 1852500 | − | 576085 | x | + | 15784729 400 | x | x |
| 1852500 | − | 576085 | x | + | 15784729 400 | x | x | = | 950 | × | 950 |
| Right side of the equation = | 902500 |
| 1852500 | − | 576085 | x | + | 15784729 400 | x | x | = | 902500 |