SOLUTION: Solve: log(x+1) + log(x-1) = log 48

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Solve: log(x+1) + log(x-1) = log 48      Log On


   

Question 404861: Solve:
log(x+1) + log(x-1) = log 48
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Solve:
log(x+1) + log(x-1) = log 48
..
log(x+1) + log(x-1)-log 48 = 0
log(x+1)(x-1)/48=0
change to exponential form
10^0=(x+1)(x-1)/48
1=(x+1)(x-1)/48
x^2-1=48
x=sqrt(49)
x=7
x=-7 (reject, x>-1)