0\\\\3t^2+8t-3=0\\\\D=100\\\\t_1= \frac{-8+10}{6} = \frac{1}{3} ,\quad t_2= \frac{-8-10}{6} <0\\\\ \\ \frac{1}{3}=3^x \\ \\x=-1" alt="3^{2x+1}+8\cdot 3^{x}-3=0\\\\3\cdot3^{2x}+8\cdot 3^{x}-3=0\\\\t=3^x>0\\\\3t^2+8t-3=0\\\\D=100\\\\t_1= \frac{-8+10}{6} = \frac{1}{3} ,\quad t_2= \frac{-8-10}{6} <0\\\\ \\ \frac{1}{3}=3^x \\ \\x=-1" align="absmiddle" class="latex-formula">