SOLUTION: ln(x-5)+ln(x+1)=ln40

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Question 387058: ln(x-5)+ln(x+1)=ln40
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
ln%28x-5%29%2Bln%28x%2B1%29=ln%2840%29
ln%28%28x-5%29%28x%2B1%29%29=ln%2840%29
%28x-5%29%28x%2B1%29=40
x%5E2-4x-5=40
x%5E2-4x-45=0
%28x-9%29%28x%2B5%29=0
Two solutions:
x-9=0
highlight%28x=9%29
.
.
.
x%2B5=0
x=-5
However, the ln function requires positive arguments so this solution is not valid.