Given an expression for f(x) with leading coefficient -3 of degree 3, having roots x=7, x=5-2i, x=5+2i

Which of the following is the result of expanding

Which expression gives you the distance between the points (5,1)and(9,-6)

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )