tolong siapa yg bisa bantu ya hehhehe

³log((x-1) / (x+1)) = 2
³log((x-1) / (x+1)) = ³log9
⇔ (x-1) / (x+1) = 9
⇔ (x-1) / (x+1)  -  9(x+1) / (x+1) = 0
⇔ (x-1) - 9(x+1) = 0
⇔ x - 1 - 9x - 9 = 0
⇔ -8x - 10 = 0
⇔ x = -10/8

syarat logaritma
x + 1 > 0
x > -1

dan 
x - 1 > 1
x > 1

jadi HP : { }