Answer:
funny I have this question and I thought it was D
5 • X < 6 > 4• X .............
Answer: An area or ridge of land and it’s useful because separates waters from flowing into different rivers
Step-by-step explanation: hope this helps
As your question is stated, there is no answer!
I'm going to assume the polynomial you meant is:

To create a perfect square trinomial, take half the coefficient of x and then square it.

In all problems like this, you want to square half the coefficient of x -- always half.