( | x | − | 2500 | ) | ( | x | − | 3000 | ) | = | 55000 |
Left side of the equation = | x | ( | x | − | 3000 | ) | − | 2500 | ( | x | − | 3000 | ) |
= | x | x | − | x | × | 3000 | − | 2500 | ( | x | − | 3000 | ) |
= | x | x | − | 3000 | x | − | 2500 | x | + | 2500 | × | 3000 |
= | x | x | − | 3000 | x | − | 2500 | x | + | 7500000 |
= | x | x | − | 5500 | x | + | 7500000 |
x | x | − | 5500 | x | + | 7500000 | = | 55000 |