diff --git a/README.md b/README.md
index e3ab761..592f476 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # linear_algebra
 ## 5 ##
 | Natrual Frequency 1 | Natural Frequency 2 | 
-| 2sqrt(5) | --- | 
+| 2sqrt(5) | 0.5(sqrt(5*(sqrt(129)-9))) | 
 
 
 ## 6 ##