Please help! please only answer if you know it's correct!

For how answer my question this will be the last question can you answer in math subject

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?

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)