Jawabanmu

2014-09-01T19:08:00+07:00
3 - √5 -2.(3-√5).(3+√5)
3 - √5 -2.(3² - √5² )
3 - √5 -2. (9-5)
3 - √5 -2.4
3 - √5 - 8
- 5 - √5