Answer:
Step-by-step explanation:
3+√5 is a root.
so 3-√5 is also a root
or (x-(3-√5)) is also a factor of f(x)
-3.073 that is the correct answer
There are a lot of numbers you can think of, for example, 1030, or even 9939, but I don't recommend you put that ;)
You should go up 3.5 on the Y-Axis and then go up .5 and over 1.