SOLUTION: Solve the logarithmic equation.
log x + log(x + 48) = 2
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Question 738480: Solve the logarithmic equation.
log x + log(x + 48) = 2
Found 2 solutions by josmiceli, MathLover1:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The key is to make the substitution
( by inspection )
( disregard )
-----------
Check:
OK
cannot be an answer because the expession
would make no sense. There cannot be a log
which will gives you a negative number.
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
....in base you will have
...use quadratic formula
solutions: we need only positive solution
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