bentuk sederhana nya adalah....

15/4√3=15/4√3 x 4√3/4√3
=60√3/16x3
=60√3/48
=10√3/8
=5√3/4

..15
-------
4V3

.....15..........V3
= ------- × --------
....4V3.......V3

......15V3
= -----------
.........12

......3(5V3)
= --------------
......3(4)

.......5V3
= ------------ (D)
..........4