If 2-4x<10 , can x=0x=0 ?

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?

Icould really use some with this question.

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2