About This Lesson
http://www.freemathvideos.com In this video series I will show you how to add and subtract rational expressions with like denominators. When we have rational expressions with like denominators we can simply keep the denominator the same and apply the operation to the numerators. In is important to remember when combining polynomials we can only combine like terms. http://www.freemathvideos.com In this video series I show you how to combine rational expressions with unlike denominators. When combining rational expressions with unlike denominators we have to make sure we find the least common multiple of the denominators called the least common denominator. By multiplying the numerator and denominator to obtain the LCD we can then apply the operation to the numerators.
