SOLUTION: ln(x)+ln(6x+1)=ln5
Please help me solve this equation
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Question 756713: ln(x)+ln(6x+1)=ln5
Please help me solve this equation
Found 2 solutions by Alan3354, ankor@dixie-net.com:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
ln(x)+ln(6x+1)=ln5
Please help me solve this equation
-----------
ln(x*(6x+1)) = ln5
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
ln(x)+ln(6x+1)=ln5
adding logs is multiply, so write it:
ln(x(6x+1)) = ln(5)
logs are equal, values are equal
x(6x+1) = 5
A quadratic equation
6x^2 + x - 5 = 0
Factors to
(6x-5)(x+1) = 0
two solutions
6x = 5
x =
and
x = -1
Only the positive solution will work in logs so
x =
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