add pass_x_throughout

polynomial.py

@@ -16,8 +16,12 @@ class Polynomial:
         self.value = value
 
     def pass_x_throughout(self, x):
-        pass
-
+        a = list(self.value)
+        sum = (a[len(a)-1]*x)+a[len(a)-2]
+        for i in reversed(range(len(a)-2)):
+            sum = sum*x+a[i]
+        return sum
+            
     def __add__(self, other):
         a = list(self.value)
         b = list(other.value)