Please help me with this quesion

Solve for x by completing the square. 2x^2-4x+7=0

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.

Ineed with math stuff it involves graphs