Question 60482
{{{log(9,(x + 4)) = log(9,x) + log(9,(x+1))}}}
since log a + log b = log ab
{{{log(9,(x + 4)) = log(9,(x)*(x+1))}}}
If the logs of the two expressions are equal, the 
expressions are equal
{{{x + 4 = (x)*(x + 1)}}}
{{{x + 4 = x^2 + x}}}
{{{x^2 = 4}}}
x = +2, -2 answer