Question

seja o polinomio p(x)= 2x^3 + x^2 -4x +1 . determine:
p(-3)
p(2)
p(i)

Answer 1

P(x) = 2x³ + x² - 4x + 1

P(-3) = 2(-3)³ + (-3)² - 4(-3) + 1
P(-3) = 2(-27) + 9 + 12 + 1
P(-3) = -54 + 22
P(-3) = -32

P(2) = 2(2)³ + 2² - 4(2) + 1
P(2) = 2(8) + 4 - 8 + 1
P(2) = 16 - 3
P(2) = 13

P(i) = 2(i)³ + i² - 4i + 1
P(i) = 2(-i) + (-1) - 4i + 1
P(i) = -2i - 1 - 4i + 1
P(i) = -6i