9^x+9^x/3=2^(x+0,5)+2^(x+3,5)
9^x*(1+1/3)=2^(x+0,5)*(8+1)
4/3*9^x=2^x*9√2
(9/2)^x=(9/2)^1,5
x=1,5
2)27*3^2x-30*3^x*2^x+8*2^2x=0/2^2x
27*(3/2)^2x-30*(3/2)^x+8=0
(3/2)^x=a
27a²-30a+8=0
D=900-864=36
a1=(30-6)/54=24/54=4/9⇒(3/2)^x=4/9⇒x=-2
a2=(30+6)/54=36/54=2/3⇒(3/2)^x=2/3⇒x=-1