In this lesson on rational expressions, we learn more about adding and subtracting rational expressions with a common denominator. We also learn how to simplify by factoring and canceling. By combining like terms, writing expressions in descending order, and factoring both the numerator and denominator, we can simplify expressions and see if anything cancels. With practice, we can gain a better understanding of how to work with rational expressions and simplify them efficiently.
More practice adding and subtracting rational expressions that already have a common denominator, and how to simplify if it is possible to cancel.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com