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Lesson 4

1. Lesson 4

1.3. Refresher

Mathematics 20-1 Module 6

Module 6: Rational Expressions

 

Refresher

 

Three resources are recommended for reviewing how to determine the lowest common denominator (LCD).

 

This is a play button that opens “Adding and Subtracting Rational Expressions 2.”

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Watch “Adding and Subtracting Rational Expressions 2.” Pay attention to how the lowest common denominator is found. In the video, the question includes stating the domain, which is another way of asking for the non-permissible values.

This is a play button that opens “Adding and Subtracting Rational Expressions 3.”

Khan Academy (CC BY-NC-SA 3.0)

Watch “Adding and Subtracting Rational Expressions 3.” Pay attention to how the lowest common denominator is found.


You can also review finding the LCD by returning to Lesson 3.

Two resources are recommended to review how to solve linear and quadratic equations.

 

This is a play button that opens “Algebra: Linear Equations 4.”

Khan Academy (CC BY-NC-SA 3.0)

Watch “Algebra: Linear Equations 4.”

This is a play button that opens “Solving Quadratic Equations by Factoring.”

Khan Academy (CC BY-NC-SA 3.0)

Watch “Solving Quadratic Equations by Factoring” to review a solution to a quadratic equation.

 

Go back to the Are You Ready section and try the questions again. If you are still having difficulty, contact your teacher.