3log(x²+1)=3log(5x-5)

jika 3 basis 

ᵃlog f(x) = ᵃlog g(x) maka f(x) = g(x)
 ³log (x² + 1) = ³log (5x - 5)
peny.
x² + 1 = 5x - 5
x² + 1 - 5x + 5 = 0
x² - 5x + 6 = 0
(x - 2)(x - 3) = 0
  x = 2   x = 3