How Do You Find the Least Common Denominator of Two Rational Expressions?

How Do You Find the Least Common Denominator of Two Rational Expressions?

Note:

When adding or subtracting rational expressions, you need have common denominators just like any other fraction. If you don't have common denominators, then you'll need to find the least common denominator (LCD) and use it to get those denominators to be the same. Learn how to find the LCD of two rational expressions by watching this tutorial!

Keywords:

  • problem
  • rational expression
  • fraction
  • algebraic fraction
  • polynomial
  • least common denominator
  • lcd
  • find least common denominator
  • numerator
  • denominator

Background Tutorials

  • Fraction Basics

      • What's a Numerator and What's A Denominator?What's a Numerator and What's A Denominator?

      What's a Numerator and What's A Denominator?

      Numerators and denominators are the key ingredients that make fractions, so if you want to work with fractions, you have to know what numerators and denominators are. Lucky for you, this tutorial will teach you some great tricks for remembering what numerators and denominators are all about.

  • Factors

      • What's a Factor?What's a Factor?

      What's a Factor?

      Factors are a fundamental part of algebra, so it would be a great idea to know all about them. This tutorial can help! Take a look!

  • Adding and Subtracting with Unlike Denominators

      • What's the Least Common Denominator?What's the Least Common Denominator?

      What's the Least Common Denominator?

      When you're working with fractions, you may need to find the least common denominator (LCD) in order to get the fractions to have a common denominator so that you can add or subtract them. The LCD is the smallest multiple that the denominators have in common. Learn about the LCD in this tutorial!

Further Exploration

  • Adding and Subtracting with Unlike Denominators

      • How Do You Add Two Rational Expressions with Different Denominators?How Do You Add Two Rational Expressions with Different Denominators?

      How Do You Add Two Rational Expressions with Different Denominators?

      Adding rational expressions together? Don't have common denominators? No problem! Find the least common denominator (LCD) and change each rational expression into an equivalent expression with that LCD. Once you have common denominators, you're ready to add and simplify! Watch it all in this tutorial!

      • How Do You Subtract Two Rational Expressions with Different Denominators?How Do You Subtract Two Rational Expressions with Different Denominators?

      How Do You Subtract Two Rational Expressions with Different Denominators?

      Subtracting rational expressions? Don't have common denominators? No problem! Find the least common denominator (LCD) and change each rational expression into an equivalent expression with that LCD. Once you have common denominators, you're ready to subtract and simplify! Watch it all in this tutorial!

  • Complex Expressions