−3.666667, hope that helps.
Answer: c
Step-by-step explanation:
Answer:
We just need to evaluate and get f(2i)=0, f(-2i)=0.
Step-by-step explanation:
Since
, then
, and we can apply this when we evaluate
for 2i and -2i.
First we have:

Which shows that 2i is a zero of f(x).
Then we have:

Which shows that -2i is a zero of f(x).
To solve this you have to divide 90 by 10 which would be 9 so
t=9
Hope it helps
The distance between these points are 6