It has to be (8, 9) because that would put the 4th corner above (8, 7) and right of (2, 9).
Answer:
x=2i, -2i
Step-by-step explanation:
For this case we have the following expression:

We must find the value of the expression when:

Substituting we have:

Finally, the value of the expression is:

ANswer:
