tolong dijawab pake cara ya. makasih

3.
³ log(2/6 x 36/4) / (³^²log3)
= ³log 3/  (1/2.  ³log 3)
= 1/ (1/2)
= 2

4.
4/(√3 + √5) =
= 4 (√3- √5)/(√3 +√5)(√3 - √5)
= 4(√3 - √5)/(3-5)
= 4(√3 - √5)./(-2)
= - 2(√3 - √5)
= -2√3 + 2√5
= 2√5 - 2√3