If p(x) = x - x2 + x + 1, then find the value of p(-1) + p(1)÷2
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Step-by-step explanation:
p(-1) = -1 -1 -1 +1 = -2
p(1) = 1 - 1 + 1 + 1 = 2
adding both
-2+2 = 0
dividing by 2
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