pakai caranya yah,thanks

[tex] 5^{x^3 - 5x^2 - 6x - 3} = \frac{1}{125} \\
5^{x^3 - 5x^2 - 6x - 3} = 5^{-3} [/tex]

x³ - 5x² - 6x - 3 = -3
x³ - 5x² - 6x = 0
x(x² - 5x - 6) = 0
x(x - 6)(x + 1) = 0
x = -1 , x = 0 , x = 6