1
-1
-x
-x
x
x
x
2
-x
2
0
0
0
0
0
0
f
(
x
) = (
x
- 2)
2
+ 1
f
(
x
) = (
x
- 2)
2
- 1
f
(
x
) = (
x
- 2)
2
+ 7
f
(
x
) = (
x
- 2)
2
- 7