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-x²|-4| -1|0|1|4|9|16|
2x|-4|-2|0|2|4|6|8|
3|-6|-3|0|3|6|9|12|
f(x)|-14|-6|0|6|8|24|16|
HPB={(-2,-14),(-1,-6),(0,0),(1,6),(2,14),(3,24),(4,36)}