In this lesson we are going to take a look at adding and subtracting rational expressions. Whether you are adding or subtracting, the most important thing to do is to find a least common denominator, and that is always the first step. If the rational expressions already have a common denominator, then we simply add or subtract the numerators of each. You'll learn how to find a common denominator for the rational expressions using factoring. When subtracting rational expressions, remember to subtract the entire second expression. Often times using parenthesis and distributing the sign will help in this process.
*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.
Adding & Subtracting 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.