Question 373784
{{{ log (sqrt (x^2-9 ))= 2 }}},
{{{10^2 = sqrt(x^2 - 9)}}},
{{{100 = sqrt(x^2 - 9)}}},
{{{10000 = x^2 - 9}}},
{{{10009 = x^2}}}, 
{{{x = sqrt(10009)}}}or {{{x = -sqrt(10009)}}}.  Both values satisfy the original equation, and thus are the final answers.