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3^2x+2 + 8.3^x < 1
buat anggapan 3^x = a
9a^2 + 8a < 1
9a^2 + 8a - 1 < 0
(9a - 1) (a + 1)
a = 1/9, a = -1
3^x = a
3^x = 1/9
3^x = 3^-2
x = -2
3^x = -1 (TM)
9^-x+1 + 8.3^-x - 1 > 0
buat anggapan 3^-x = a
9a^2 + 8a - 1 > 0
(9a - 1) (a + 1)
a = 1/ 9, a = -1
3^-x = 3^-2
-x = -2 ---> x = 2
3^-x = -1 (TM)
maaf, cuma bisa begitu. sorry klo salah dan kurang jelas, ya.