SOLUTION: Solve a) log(base 5) ( r+2) +log(base 5)(r-2) = 1 Can you please help me out? Thanks so much in advance:)

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Solve a) log(base 5) ( r+2) +log(base 5)(r-2) = 1 Can you please help me out? Thanks so much in advance:)      Log On


   

Question 810575: Solve
a) log(base 5) ( r+2) +log(base 5)(r-2) = 1
Can you please help me out? Thanks so much in advance:)
Answer by erica65404(394) About Me  (Show Source):
You can put this solution on YOUR website!
log%285%2C%28r%2B2%29%29%2Blog%285%2C%28r-2%29%29=1
log%285%2C%28%28r%2B2%29%28r-2%29%29%29=1

exponentiate
log%28a%2Cc%29=b
a%5Eb=c


5%5E1=%28r%2B2%29%28r-2%29
5=r%5E2-4
r%5E2=9
sqrt%28r%5E2%29=sqrt%289%29
r=+%2B-+3+