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1. May 8, 2015

### Prof. 27

1. The problem statement, all variables and given/known data
log39x4 - log3(3x)2

The answer sheet says that the answer is 0, but when I work the problem both ways I get:
2log3x

Any ideas?

2. Relevant equations
logxy/z = logxy - logxz

3. The attempt at a solution
Formula Sheet
20-30 Minutes of Messing around with the problem

2. May 8, 2015

### certainly

But $(3x^2)^2=9x^4$..................
[Edit:- so yeah either you typed the question wrong or the answer cannot be 0.]

3. May 8, 2015

### Prof. 27

I typed it correctly. That's what I thought, but I assumed I must be going crazy or something :| Strange...

4. May 8, 2015

5. May 8, 2015

### Ray Vickson

The formatting of the question is not entirely clear. Do you mean
$$\log_3 (9x^4) - \log_3 ((3x)^2)\:?$$