Adding rational expressions with different denominators 5

Sick of ads?‚Äč Sign up for MathVids Premium
Taught by YourMathGal
  • Currently 4.0/5 Stars.
6874 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Description:

Shows how to add and subtract algebraic fractions by getting a common denominator.

More free YouTube videos by Julie Harland are organized at

Questions answered by this video:
  • How do you add and subtract rational expressions with unlike denominators?
  • How do you subtract (5x - 1)/(x^2 - 4x + 4) - (3x + 1)/(3x - 6)?
  • How can you rewrite the solution to a problem if the leading coefficient of the numerator is negative?
  • How do you subtract 7x/(3 - x) - (4x + 9)/(x - 3) if the denominators of the fractions are opposites?
  • How do you subtract 7x/(x - 3) + (4x + 9)/(3 - x) if the denominators of the fractions are opposites?
  • How can you cancel terms in 3(x - 3)/(x - 3)?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson tackles some more difficult problems for factoring the denominators and finding least common denominators of algebraic fractions, and then adding or subtracting them. All steps are explained in this extension of this series on adding and subtracting rational expressions with different denominators.