If p(x) = x^3 - 4x + 3, evaluate
p(2) + p(-1) + p(1/2)
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p(x) = x³ - 4x + 3
p(2)
☛ p(2) = (2)³ - 4(2) + 3
☛ p(2) = 8 - 8 + 3
☛ p(2) = 3
p(-1)
☛ p(-1) = (-1)³ - 4(-1) + 3
☛ p(-1) = -1 + 4 + 3
☛ p(-1) = 6
p(1/2)
☛ p(1/2) = (1/2)³ - 4(1/2) + 3
☛ p(1/2) = 1/8 - 2 + 3
☛ p(1/2) = 25/8 - 2
☛ p(1/2) = (25 - 16)/8
☛ p(1/2) = 9/8
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