Jawabanmu

2014-09-03T11:02:43+07:00
= 4(2+√3)(2-√3) / 3+√5
= 4(4+2√3-2√3-3) / 3+√5
= 4(4-3) / 3+√5
= 4 / 3+√5

Dirasionalisasikan:
= (4 / 3+√5) x (3-√5/3-√5)
= (12-4√5) / (9-3√5+3√5-5)
= (12-4√5) / (9-5)
= (12-4√5) / 4
= 3-√5