first multiply each side by 9^x
you get: 3x^2 = 27 x 9^x
now divide both sides by 3
you will get
x^2= 9 x 3^x
now you have to bring that x down so you have to take log base 3 of 3 to both sides
log 3 (x^2) = log 3 (9) log 3 (3^x)
log 3 (x^2) = 2x
divide 2 on both sides
x = log base 3 (x^2) / 2
hope i did this right iam very tired its nearly 3 am