Dear Edward,

 Please consult

https://sites.math.rutgers.edu/~zeilberg/Hist21/q6S.pdf

for the full solutions.

You got 7 points (out of 10). I don't understand what you did in #4. Perhaps you followed a different method than what I taught, and
indeed you got the root x=1. But the other two roots were wrong.


 Best wishes,

   Dr. Z.