tolong dibantu yaa.. makasih:)

3^(2x + 1) + 3^(2x + 2) = 4 ^3√(9^(x - 2))
3^2x . 3^1 + 3^2x . 3^2 = 4 . 9^(x - 2)/3
9^x . 3 + 9^x . 9 = 4 . 9^(x - 2)/3
9^x . (3 + 9) = 4 . 9^(x - 2)/3
9^x . 12 = 4 . 9^(x - 2)/3
9^x / 9^(x - 2)/3 = 4/12
9^(x - (x - 2)/3) = 1/3
9^(3x - x + 2)/3 = 3^-1
9^(2x + 2)/3 = 3^-1
3^2(2x + 2)/3 = 3^-1
2(2x + 2)/3 = -1
4x + 4 = -3
4x = -7
x = -7/4