Hii can someone me with this problem? : ) write the answer as scienific notation

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 y varies directly as x2 and y=6 when x=6, find the constant of variation.

Which of these tools or constructions is used to inscribe a hexagon inside a circle?