In this lesson, you will learn how to add and subtract rational expressions with different denominators by finding a common denominator. The first part of the lesson reviews adding fractions with the same denominator, and then dives into examples with varying denominators. The teacher demonstrates how to use the "jealousy method" to find the least common denominator, and also provides an alternative method for finding it quickly. By the end of the lesson, you will be able to add and subtract rational expressions with confidence, even when the denominators are not the same.
Shows how to add and subtract algebraic fractions by getting a common denominator.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com