1. 3^log(x^2-4x-3)=2 2. x^log (6x^2-8x)=3 3. 3^log (x^2+1)=3^log5 4. log (2x+1) = log (x+9)

nomor 1
3^log(x^2-4x-3)=2
3^log(x^2-4x-3)=3^log9
x^2-4x-3 = 9
x^2-4x-12 = 0
(x-6)(x+2) = 0
x = 6 atau x = -2

nomor 2
 x^log (6x^2-8x)=3
x^3 = 6x^2-8x
x^3 - 6x^2+8x = 0
x(x^2 - 6x+8x) = 0
(x-0)(x-4)(x-2)
x = 0, x = 4, atau x= 2

nomor 3
3^log (x^2+1)=3^log5
x^2+1 = 5
x^2-4 = 0
(x-2)(x+2) = 0
x=-2 atau x = 2

nomor 4 
log (2x+1) = log (x+9)
2x+1 = x+9
x=8