The root x= 1 has the multiplicity 2 for the function f(x) = x^3 - x^2 - x + 1

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.