Find the point f such that df and ef form a 1: 3 ratio. e(2,4) d(-3,-3)

Find the value of the cosine for angle a

Find the value of x that will make l ll m

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?