Help me or give me answer key plz

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

There are 3232 forwards and 8080 guards in leo's basketball league. leo must include all players on a team and wants each team to have the same number of forwards and the same number of guards. if leo creates the greatest number of teams possible, how many guards will be on each team?