( | 2 | m | − | 1 | ) | ( | 2 | m | − | 1 | ) | − | 4 | m | m | = | 2 |
Left side of the equation = | 2 | m | ( | 2 | m | − | 1 | ) | − | 1 | ( | 2 | m | − | 1 | ) | − | 4 | m | m |
= | 2 | m | × | 2 | m | − | 2 | m | × | 1 | − | 1 | ( | 2 | m | − | 1 | ) | − | 4 | m | m |
= | 4 | m | m | − | 2 | m | − | 1 | ( | 2 | m | − | 1 | ) | − | 4 | m | m |
= | 4 | m | m | − | 2 | m | − | 1 | × | 2 | m | + | 1 | × | 1 | − | 4 | m |
= | 4 | m | m | − | 2 | m | − | 2 | m | + | 1 | − | 4 | m | m |
= | 4 | m | m | − | 4 | m | + | 1 | − | 4 | m | m |
4 | m | m | − | 4 | m | + | 1 | − | 4 | m | m | = | 2 |
m= | - | 1 4 |