| √4x2 − 20x +25 | √(2x −5)2 | |2x − 5| | ||||
1. W= | = | = | = | |||
| 25 − 4x2 | 25 − 4x2 | 25 − 4x2 |
| |2x − 5| | 2x−5 | −1 | |||
= | = | ||||
| (5−2x)(5+2x) | (5−2x)(5+2x) | 5+2x |
| √4x2 − 20x +25 | √(2x −5)2 | |2x − 5| | ||||
2. W= | = | = | = | |||
| 25 − 4x2 | 25 − 4x2 | 25 − 4x2 |
| |2x − 5| | 5−2x | 1 | |||
= | = | ||||
| (5−2x)(5+2x) | (5−2x)(5+2x) | 5+2x |
| 5 | 5 | |||
D = R − {− | , | } | ||
| 2 | 2 |