x-1 + x0 + x1 = (-1)^2 + 5 + (0)^2 + 5 + (1)^2 + 5 = 6 + 5 + 6 = 17
Answer:
(-1)^2+5= 1+5=6
(0)^2+5= 0+5= 5
(1)^2+5= 1+5= 6
6+5+6= 17
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