1. Lesson 5

1.3. Refresher

Mathematics 20-1 Module 5

Module 5: Radicals

 

Refresher

 

Review this example, which shows the squaring of a radical with a binomial radicand.

 

Simplify .

Notice that the following two expressions are not equal since the right side is valid for any value of q, but the left side is only valid for .

 

 

 

Squaring a square root is an example of inverse operations, so  becomes 3q − 7, but with a restricted domain—the domain of the original expression, .

This is a play button that opens “Operations with Radical Expressions.”

Screenshot reprinted with permission of ExploreLearning

“Operations with Radical Expressions” helps identify the correct steps in completing operations with radical expressions. Click the “new” button to find examples of multiplication of binomials that contain radicals.


This is a play button that opens “Square a Binomial.”

Khan Academy CC BY-NC-SA 3.0

If you are having difficulty squaring binomials (without radicals) watch “Square a Binomial.”

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