please answer me is it strong?

This isn't a good formation for MU. In my opinion, Brown should replace by Vidic. Scholes and Giggs. Both of them are old, either Giggs should replace by nani or Scholes should replace by Fletcher. Coz if the team have no Old Star, the team might be an Inexperience team.

Yep, agree there about having Vidic in for Brown, much better player for the position. It's horses for courses otherwise. Just depends who you fancy. Scholes is probably better than Fletcher, Giggs is probably better than Nani (plus he's a natural southpaw).
Is this for a console game? If so, just try it out.
:-D