ĐKXĐ: \(x>log_96\)
\(log_2\left(4.3^x-6\right)-log_2\left(9^x-6\right)=1\)
\(\Leftrightarrow log_2\left(\dfrac{4.3^x-6}{9^x-6}\right)=1\)
\(\Leftrightarrow\dfrac{4.3^x-6}{9^x-6}=2\)
\(\Leftrightarrow9^x-2.3^x-3=0\)
\(\Rightarrow\left[{}\begin{matrix}3^x=-1< 9\left(loại\right)\\3^x=3\end{matrix}\right.\) \(\Rightarrow x=1\)