2 akar 5/akar 6-akar 8

2√5/(√6 – √8) = (2√5/(√6 – √8))((√6 + √8)/(√6 + √8)) = (2√5(√6 + √8))/(√6 – √8)(√6 + √8) = (2√30 + 2√40)/(6 – 8) = 2(√30 + √40)/-2 = -√30 – √40 = -√30 – 2√10