Flash CS6 Actionscript for Beginners - Operators

[TonnyTay]

my program: var x1:int = 100;
var y1:int = 50;
var x2:int = 200;
var y2:int = 150;
var xdiff:int = x2 - x1;
var ydiff:int = y2 - y1;
var xdiff:Number = Math.pow(2);

var sroot:Number = Math.sqrt(20000);
trace( sroot );

[TonnyTay]

Hey I got a question, it is about the Distance formula, I can't seem to figure out how to insert a exponent only ones I know of is the pow and exp, but everytime I put a 2, it gets a error. help please, reply fast.