[tex]3^{x+1} + 9^x - 18 = 0[/tex]
[tex]3^x * 3 + (3^x)^2 - 18 = 0 [/tex]
[tex]a^2 + 3a - 18 = 0 [/tex] - Delta
[tex]a_1 = 3; a_2 = -6[/tex]
[tex]3^x = 3 =\ \textgreater \ x = 1 [/tex]
[tex]3^x = -6 [/tex] - X nu are solutii in R
Solutie comuna => m = 1