Tentukan nilai x yang memenuhi 2.3 log x - 3 log 2 = 3 log (4+x) !

= 3 log x^2 - 3 log 2 = 3 log (4+x)
3 log x^2/2 = 3 log 4+x
x^2/2 = 4 +x
x^2 = 8 + 2x
x^2 -2x -8 = 0
(x-4) (x+2) = 0
x= 4 atau x= 2