Ten Hag said: "It's always nice to win any game. It's important to win the last game at Old Trafford this season. The fans deserve this because they've had difficult times and always stayed with us.
"We are here together. We wanted to pay the fans back.
"Fantastic. Great goals. But it was a team effort how we made the goals. But I'm always happy at young players who are progressing very good and scored some brilliant goals.
"Newcastle have a lot of physical power and you have to match that but you also have to play football. We had found the really good balance in this.
"I think he (Hojlund) needs some rest so he's fresh. Strikers live for goals. It's very important for his confidence so I'm really pleased he scored."
On the FA Cup final, he added: "We don't think about this yet. First we have Brighton in the last game which is important in the ranking. We don't have it in our hands but we have to do our job."