Which of the following polynomials represent a difference of squares? x^2-6 2x^2-9 4x^2-16 9x^2+25 which polynomial represents a difference of cubes? x^3-9 x^3+27 8x^3-1 16x^3-27

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.