SOLUTION: log_2(x + 5) + log_2 (x − 5) = 3 Why is the domain (5,∞) and not including the (-5,∞) since they are both in the equation why only that domain? Thanks

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: log_2(x + 5) + log_2 (x − 5) = 3 Why is the domain (5,∞) and not including the (-5,∞) since they are both in the equation why only that domain? Thanks      Log On


   

Question 957514: log_2(x + 5) + log_2 (x − 5) = 3
Why is the domain (5,∞) and not including the (-5,∞) since they are both in the equation why only that domain?
Thanks
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Prevent the expression input of the logarithm being negative, because two cannot be raised to a power to give a negative value.