I am studying for a math competition at my school and this here just stumps me.
And this is what I have got after a long time of trying...
But the answer key says the answer is:
can someone explain this to me?
I think someone above has already corrected the error. I personally think that you made a tiny mistake after the above stage. It should be
The negative applies to both of the two log functions at the end, just as it does at the beginning of my post when they are combined.
This then becomes the correct answer of: