The equation of the polynomial function is:
a. f(x)=(x+(2+i))(x+(2-i))(x+5)
b. f(x)=(x-(2+i))(x-(2-i))(x-5)
c. f(x)=(x-(2+i))(x-(2-i))
d. f(x)=(x+(2+i))(x-(2-i))(x-5)