It looks like you might have intended to say the roots are 7 + i and 5 - i, judging by the extra space between 7 and i.
The simplest polynomial with these characteristics would be

but seeing as each of the options appears to be a quartic polynomial, I suspect f(x) is also supposed to have only real coefficients. In that case, we need to pair up any complex root with its conjugate to "complete" f(x). We end up with

which appears to most closely resemble the third option. Upon expanding, we see f(x) does indeed have real coefficients:

Answer:
B, -12
Step-by-step explanation:
edge2020
Answer:
use photomath and it will solve ur problem
Answer:
A) 60 percent of 30 is 18
B) if there are 30 students total and 18 of them are girls then 30-18=12 so 12 are boys
:D have a good day!