# Math Help - logs problem

1. ## logs problem

log2 (x+1) + log2 (x-1) = 3 ..... log to base 2

2. Note that

$\log_bx+\log_by=\log_b(xy)$

And

$\log_bx=y$ if and only if $b^y=x$.

With these two propeties of logarithms, you should be able to solve this equation.