( | 10 | − | x | ) | ( | 100 | + | 100 | x | ) | = | 9600 |
Left side of the equation = | 10 | ( | 100 | + | 100 | x | ) | − | x | ( | 100 | + | 100 | x | ) |
= | 10 | × | 100 | + | 10 | × | 100 | x | − | x | ( | 100 | + | 100 | x | ) |
= | 1000 | + | 1000 | x | − | x | ( | 100 | + | 100 | x | ) |
= | 1000 | + | 1000 | x | − | x | × | 100 | − | x | × | 100 | x |
= | 1000 | + | 900 | x | − | x | × | 100 | x |
1000 | + | 900 | x | − | x | × | 100 | x | = | 9600 |