In this lesson, we are introduced to rational expressions and learn that they are fractions, and that they become undefined when the denominator equals 0. By plugging in values for x, we can simplify rational expressions and determine when they are undefined. Additionally, we learn that any number divided by 0 is undefined, and that 0 divided by 0 is also undefined.
This is an introduction to Rational Expressions in beginning algebra.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com