PLZ HELP DUE SOON also answer my other questions

For what value of a will this equation has only one real root:
(2a-5)x²-2(a-1)x+3=0

Can someone me with these two circle theorem questions asap?

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?

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}