3^x=t
t^2-24t-81=0
D=576+324= 900
t1=(24+30)/2= 54/2=27
t2=(24-30)/2=-6/2=-3
3^x=27
3^x=3^3
x=3
3^x =-3
x∈∅
Ответ: x=3
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3^x=t
t^2-24t-81=0
D=576+324= 900
t1=(24+30)/2= 54/2=27
t2=(24-30)/2=-6/2=-3
3^x=27
3^x=3^3
x=3
3^x =-3
x∈∅
Ответ: x=3