Find a cubic function with the given zeros.
Square root of seven., -Square root of seven., -4

f(x) = x^3 + 4x^2+ 7x - 28
f(x) = x^3 + 4x^2 - 7x - 28
f(x) = x^3 - 4x^2 - 7x - 28
f(x) = x^3 + 4x^2 - 7x + 28