okay I hope this actually worked

(c) Show that x - x-12 is a factor of f (x)= x* -7x'-x3 +67x-60. Factor f (x) completely. (d) Show that x = 4 is a zero of the polynomial function f (x) =2x' -23x2 +10x+200. Factor f (x) completely, and determine the x-intercept of the graph of y = f (x). Sketch the graph of y = f (x)