¿Como se calcula el descuento?

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?

Find the area of a parallelogram with base 15 yards and height 21 2/3

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?