The answer to your question is w =40(2)n [n is in exponent form I just couldn’t type it that way ]
Answer:
4y²-1/4 is the required answer
Step-by-step explanation:

You didn't give the fourth zero, but the answer is still false. If you have a root or an imaginary number as a zero, then its conjugate is also a zero. So if 8i is a zero, then -8i must also be a zero, and if 4i is a zero, then -4i must be a zero, with those zeros and -4, the number of zeroes exceeds the number of zeroes that a fourth degree polynomial can have.