To find out when the parabola is positive and when it is negative, we must plot its graph.

Then we will look at

When the graph of the parabola is above the $X$ axis, with a positive $Y$ value, the set is positive

When the graph of the parabola is below the $X$ axis, with a negative $Y$ value, the set is negative**Let's see it in an illustration:**

**We will ask ourselves:**

When is the graph of the parabola above the $X$ axis?

When $X>-1$ or $X<-6$

Therefore, the sets of positivity of the function are: $X>-1$,$X<-6$

Now we will ask When is the graph of the parabola below the $X$ axis?

When $6<X<-1$

Therefore, the set of negativity of the function is: $-6<X<-1$