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Y = x^2 - x - 2
x^2 - 2x + 3 = x^2 - x - 2
0 = x^2 - x^2 - x + 2x - 2 + 3
= x + 1
x = 1
x = 1 -> y = x^2 - x - 2
= 1^2 - 1 - 2
= 1 - 1 - 2
= 0 - 2
= -2
HP = {(1 , -2)}