tolong bantu jawab y pertanyaan: 8xpangkat3/2 -xpangkat-3/2 +7=0

Misalkan x^3/2=y
8y-1/y+7=0
Kalikan dgn y
8y²-1+7y=0
8y²+7y-1=0
8y²+8y-y-1=0
8y(y+1)-1(y+1)=0
(8y-1)(y+1)=0
y=⅛ atau y=-1
x^3/2=1/8
(x^1/2)³=(½)³
x^½=½
x=(½)²=¼
x^3/2=-1
(x^½)³=(-1)³
x^½=-1
x=(-1)²=1
Jd x=¼ atau x=1