PLEASE HEL If two of the roots of a polynomial equation are x=5 and x=-3-2i then what is one other number that is guaranteed to be a root of the equation

Anew movie is released each year for 14 years to go along with a popular book series. each movie is 2 minutes longer than the last to go along with a plot twist. the first movie is 70 minutes long. use an arithmetic series formula to determine the total length of all 14 movies