The answer would be (-7x+8), the -1 basically means to switch the symbols
Yours d+v=45minutes and roommate d+v=100minutes
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.
It would be 5300 when rounded
