Explain this: : ) calculus i note: i will do anything for you

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?

Which diagram shows lines that must be parallel lines cut by transversal?

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?