LCD Method 1 Part 2 - Rational Expressions

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Taught by YourMathGal
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Lesson Summary:

In this lesson, the LCD Method 1 Part 2 for finding the Least Common Denominator of Algebraic Fractions is explained. The method involves finding the least common multiple of the denominators, which can be done by writing everything in prime factorization form and choosing the highest exponent for each factor. The transcript includes several examples of how to apply this method, including factoring the denominators and looking for different kinds of factors. Although these problems are more advanced, the video provides clear instructions and tips for success.

Lesson Description:

Shows a method for finding the Least Common Denominator of Algebraic Fractions.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

Questions answered by this video:
  • How do you find the least common denominator of algebraic fractions or rational expressions?
  • What is an LCD and how do you find one in Algebra?
  • How do you find the LCD of 3 different Algebraic fractions?
  • What is the LCD of 5/9x^4y, 7/15xy^3, and 8/10x^2y^4?
  • How do you deal with exponents when finding least common denominators?
  • How do you find the LCD of 2x/(5x + 10), 9/75x^2, and 8/(x^2 - 4)?
  • What is the LCD of (3x + 1)/(x^2 + 6x + 9), 8x/(5x^5 + 15x^4), and 9/10x?
  • How do you find the least common denominator of 5x/(3x + 24), 9/(x^2 - 64), and (2x - 3)/(9x + 72)?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson goes through a bunch more practice problems for finding the least common denominator of algebraic fractions. This time, 3 different fractions are used. The building up method of finding the LCD is explained, and all steps are shown very clearly in this video.