Omg someone anybody help!! Please

Given right triangle xyz, which correctly describes the locations of the sides in relation to

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?

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55