If you double the input of a function and it results in twice the output

Which of the binomials below is a factor of this trinominal? x^2-13+30

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?

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,