SOLUTION: lnx+ln(x+8)=4 i need help on how to solve this step by step

Question 928273: lnx+ln(x+8)=4
i need help on how to solve this step by step
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!

That is a base logarithm, so
<--->
That is a quadratic equation.
We cannot solve this one by factoring, because the result is not a rational number.
We can use the quadratic formula, as a computer would do,
but humans would solve it easier and with more understanding by completing the square:

--->--->
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