In the lesson on Roots and Zeros, Dr. Eaton first begins with the number of roots and how they can be real or complex in nature. Next is Descartes' Rule of Signs with both positive real roots and negative real roots. Finally, you end with finding the roots as well as how to deal with conjugate roots. Four video examples round out this lesson.
If the coefficients of the polynomial are real, then complex roots occur as conjugate pairs.
Learn and understand Descartes’ rule of signs for the roots of a polynomial.
Use synthetic substitution to find the roots of a polynomial of degree 3 or more.
Roots and Zeros
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.