Upload solution2 to 0069 with python2 - 28ms

Author: zhanary

solution/0069.sqrt-x/Solution2.py

@@ -0,0 +1,9 @@
+# Newton's Method [python2] - 28ms
+
+class Solution(object):
+    def mySqrt(self, x):
+        r = x
+        while r * r > x:
+            r = (r + x/r)/2
+        
+        return r