Logarithm problem.

[MathFail]

I need to be able to work it out to gain full credit if you could give me the answer I could work it out by trial and error

 

[lookagain]

I need to be able to work it out to gain full credit if you could give me the answer I could work it out by trial and error

We are not here to give you the answer.

Note: log(A) + log(B) = log(A*B)

And, (x + 1)(x - 1) simplifies to what?