
0\\\\m^{2}-30m+81=0\\\\m_{1} =3;m_{2}=27\\\\3^{x}=3\\\\x_{1}=1\\\\3^{x}=27\\\\3^{x}=3^{3}\\\\x_{2}=3" alt="2)3^{2x}-30*3^{x}+81=0\\\\3^{x}=m,m>0\\\\m^{2}-30m+81=0\\\\m_{1} =3;m_{2}=27\\\\3^{x}=3\\\\x_{1}=1\\\\3^{x}=27\\\\3^{x}=3^{3}\\\\x_{2}=3" align="absmiddle" class="latex-formula">

x ∈ (- ∞ ; 4)

x ∈ [- 2/3 ; + ∞)

решений нет
Ответ : 3

ОДЗ :
2x + 3 > 0
2x > - 3
x > - 1,5

Ответ : - 1