vb 3
2log(x)= 4log(x+
12)
2log(x) = 2log(x
+12)/2log(4)
2log(x) = 2log(x
+12)/2
2*2log(x) = 2log
(x+12)
2log(x^2) = 2log
(x=12)
x^2 = x+12
x^2-x+12=0
(x+3)(X-4)=0
x=-3 v x=4
vn v