Dr. Eaton covers Dividing Rational Expressions in this lecture and begins with the procedure of finding the reciprocal of an expressions. She then moves into why you need to cancel before multiplying as well as how to deal with rational expressions containing polynomials.
When dividing one rational expression by another one, first invert the second rational expression and change the operation from division to multiplication. Then factor all the numerators and denominators, and cancel the common factors. Combine the remaining factors to form the final, simplified answer.
If two factors in the numerator and denominator look almost the same, factor 1 out of either of the factors and see if you get two identical factors.
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Dividing Rational Expressions
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.