tolong Bantu jawab please 3^2x+2+8.3^x-1=0

3^2x+2+8.3^x-1=0 mis.3^x=p
3^2x.3^2+8.3^x-1=0
9p²+8p-1=0
(9p-1)+(p+1)=0
p=1/9 p=-1

p=3^x=1/9
x=-2
p=3^x=-1
x=0

berarti x antara -2 dan 0
terimakasih