A fourteen foot ladder is leaning against a building at an angle of elevation
of 75 degrees. How high up is the point on the building where the top of
the ladder makes contact with the building? Round your answer to the
nearest tenth.

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?