Working out SQRT on a list

[Ashok Kumar]

Hi 
I like a simple sqrt operation on a list but I don't get the result
scala val l = List (1,5,786,25)l: List[Int] = List(1, 5, 786, 25)
scala> l.map(x => x * x)res42: List[Int] = List(1, 25, 617796, 625)
scala> l.map(x => x * x).sqrt<console>:28: error: value sqrt is not a member of 
List[Int]              l.map(x => x * x).sqrt
Any ideas
Thanks