How do you go from standard to vertex form?

Landon wrote that 3−2.6=4. which statement about his answer is true?

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.

Y= a(x-3)squared-1 what is the value of a