Given the functions:
[tex]f(x)=x^2+2x[/tex][tex]g(x)=log(2x+1)[/tex]
You can graph both functions. See the graph shown below:
You know that the negative numbers are less than zero. Therefore, in order to determine the interval on which both functions are negative, you can use the graph:
The red lines show the interval. This is:
[tex](-2,0)[/tex]
Hence, the answer is: Second option.
