Answer:
9,-4
Step-by-step explanation:
-9×4=-36
Negative × Positive = Negative
#2 #3 and #5 I think but I could be wrong. Good luck!
Step-by-step explanation:

Weather I think I'm not sure
There is a line and a parabola in the graph.
So, we will get the solution set from the point of intersection of both line and parabola.
Notice that the parabola and the line intersecting at two points E(1, 5) and C(-0.5,2).
So, the solution set is E(1, 5) and C(-0.5,2).