Rational Expressions 8
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Part of video series
Errors in this video:
In the final problem, the second-to-last simplifying step should read
(4x - 6)/(2(2x^2 + 5x - 12)).
Lesson Description:
More practice adding and subtracting rational expressions that already have a common denominator, and how to simplify if it is possible to cancel.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- How do you add an subtract rational expressions with common denominators?
- How do you subtract and simplify (5x^3 - 13)/(x^2 - 3x + 2) - (10x^2 - 13)/(x^2 - 3x + 2)?
- How do you factor so you can you simplify or cancel terms in (5x^3 - 10x^2)/(x^2 - 3x + 2)?
- How do you add and simplify (15x^2 - 4x)/(9x^2 - 4) + 14x/(9x^2 - 4)?
- How do you factor so you can you simplify or cancel terms in (15x^2 + 10x)/(9x^2 - 4)?
- How do you subtract and simplify (7x - 12)/(4x^2 + 10x - 24) - (3x - 6)/(4x^2 + 10x - 24)?
- How do you factor so you can you simplify or cancel terms in (4x - 6)/(4x^2 + 10x - 24)?
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Staff Review
The problems in this lesson are more practice doing the same thing as the previous recent lessons have done. Some terms have higher powers than 2, however. Many good problems are shown step by step and explained in their entirety. Great practice lesson.
