Question

Solve the following
3^x+2 + 3^-x = 6

Answer 1

3^x*3^2+1/3^x=6

let the 3^x=a

9a+1/a=6

9a^2-6a+1=0

a=1/3

3^x=1/3

3^x=3^-1

x=-1