Logarithmic function problems

1. May 11, 2008

feiser

1. The problem statement, all variables and given/known data
solve x.
Log(35-x^3)/Log(5-x)=3

2. Relevant equations
Log(a/b)=Log a - Log b

3. The attempt at a solution
The answers would be 3 or 2
(so i'm guessing it has sumthing to do with quadratics)
i tried to expand the left side first, then rearrange it to Log(7/x^4)=3
the problem is thats not giving me the answer, which i got was 0.28925076.

Last edited: May 11, 2008
2. May 11, 2008

lzkelley

The relevant equations you gave aren't necessary for the problem.
Move the Log(5-x) to the right hand side, then eliminate the logarithms. Then its just an algebra problem.

3. May 11, 2008

Thanks.