K
(
x
) +
L
(
x
) = 0
,
,
;
x
+
x
+
x
+ 2
x
1
-
2
x
2
+ 2
x
3
-
1 = 0
tai
x
+
x
+
x
-
8
x
1
+ 8
x
2
-
8
x
3
-
1 = 0
.