SOLUTION: Please help me solve {{{lnx+ln(x+3)=1}}}

Question 419876: Please help me solve
Found 2 solutions by nerdybill, josmiceli:
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!

Solve by applying the quadratic formula to give:
x = {0.729, -3.729}
we can throw out the negative solution leaving:
x = 0.729
.
Details of quadratic formula follows:
.

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=19.873127312 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 0.728964294913671, -3.72896429491367. Here's your graph:

Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
a general rule is:

For example:

Just work the rule backwards
----------------------

Now use the general rule
then,

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answer
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