diff --git a/src/main/java/src/TasksFrame.java b/src/main/java/src/TasksFrame.java
index 18bfa1b..b606bd4 100644
--- a/src/main/java/src/TasksFrame.java
+++ b/src/main/java/src/TasksFrame.java
@@ -988,6 +988,14 @@ public class TasksFrame extends JFrame {
         return x;
     }
 
+    public int bin2(int a, int b)
+    {
+        int x = 0;
+        x = a*a - 2*a*b + b*b;
+        return x;
+    }
+
+
     private void setupBinF()
     {
         JPanel jPanel = setupPanel("Binomisches Formel");
diff --git a/src/test/java/src/TasksFrameTest.java b/src/test/java/src/TasksFrameTest.java
index 481b32b..27503d7 100644
--- a/src/test/java/src/TasksFrameTest.java
+++ b/src/test/java/src/TasksFrameTest.java
@@ -16,6 +16,17 @@ class TasksFrameTest {
         assertEquals(100,x2);
     }
 
+    @Test
+    void bin2()
+    {
+        TasksFrame tasksFrame = new TasksFrame();
+        int x = tasksFrame.bin2(5,4);
+        assertEquals(1, x);
+        int x2 = tasksFrame.bin2(7,3);
+        assertEquals(16,x2);
+    }
+
+
     @Test
     void setupPI() {
         TasksFrame tasksFrame = new TasksFrame();