I believe the 3rd answer down if the information you provided is correct
Squaring the sum on the top, rules out 1 and 2 (not squaring the 7 only)
then 4 times the difference. so I believe 4 (x-1) on the bottom.
Using the factor theorem, it is found that the polynomial is:

Given by the first option
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Given a polynomial f(x), this polynomial has roots
using the factor theorem it can be written as:
, in which a is the leading coefficient.
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In this question:



- By the options, leading coefficient

Thus:



Which is the polynomial.
A similar problem is given that: brainly.com/question/4786502
A = 9 (Sorry I can't do the other ones, I haven't learned those ones yet) Hope this helps!! :P
Answer:
positive, its above 0
Step-by-step explanation: