You can put this solution on YOUR website! Write a polynomial function of least degree that has real coefficients, the given zeros and a leading coefficient of 1.
4, -4, -3i
If the coefficients are all Real Numbers and -3i is a zero, then
so is +3i a zero.
f(x) = k(x-4)(x+4)(x+3i)(x-3i), where k is any Real Number except 0.