Question

Express 3^2 = x as a logarithmic equation.

log3x = 2

log32 = x

log23 = x

log2x = 3

Answer 1

Taking the log of both sides of the equation, you have

`2\log(3)=\log(x)`
Dividing by log(3), this looks like the change of base formula.

`\log_a(b)=(\log(b))/(\log(a))`

That is, division by log(3) gives

`2=(\log(x))/(\log(3))\\\\2=log_3(x)`

This apparently matches your first choice:
log3(x) = 2