Question

At which value of the function F(x) have a vertical asymptote?

Answer 1

A vertical asymptote occurs when the denominator is Zero. So what value(s) (hint, there's two) would make the denominator equal to zero.

Answer 2

To do this, take both factors ( (x+1) and (x+2) ) and set each of them equal to zero and solve for them separately, and the (two) values you get should correspond with (two) answers.