SOLUTION: Log(x) + log (x+3)= log28

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Log(x) + log (x+3)= log28      Log On


   

Question 986649: Log(x) + log (x+3)= log28
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Log(x) + log (x+3)= log28
-----
log[x(x+3)] = log28
-----
x^2+3x-28 = 0
-----
Factor:
(x+7)(x-4) = 0
----
Positive solution:
x = 4
------------
Cheers,
Stan H.
----------