4) Listen Find all zeros of the function and write the polynomial as a product of f(x)=x4+3x3+6x + 12x+8 Of(x)=(x+1)(x+2)(x-21)(x + 2i) f(x)=(x-1)(x-2)(x-21)(x + 2i) f(x)=(x-i2)(x+i2)(x-2)(x+2) f(x)=(x-1)(x+2)(x-2)(x+2)