x -x²/3 -(x+2)²/3 -(x-2)²/3
-6 -12.0 -5.3 -21.3
-4 -5.3 -1.3 -12.0
-2 -1.3 模迹 0.0 -5.3
0 0.0 -1.3 -1.3
2 -1.3 -5.3 肆码答0.0
4 -5.3 -12.0 -1.3 裂慧
6 -12.0 -21.3 -5.3