Question

Maaf tolong ya kaka kaka. yang di lingkari

Answer 1

A)
5/√15
= 5/√15.√15/√15
= 5√15 / √225
= 5√15 / 15
= 1/3 √15


b)
2/√20
= 2/√20 . √20/√20
= 2√20 / √400
= 2√20 / 20
= 1/10 √20