Rationalizing the denominator
In this lesson, the instructor explains how to simplify expressions by rationalizing the denominator. They demonstrate how to get rid of a radical to make it easier to work with, using the example of 4 divided by the square root of 3. They show that you can multiply the radical with itself to remove it and provide multiple ways of expressing the simplified answer.
Here I show how to simplify an expression.
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- How do you rationalize the denominator of a fraction?
- What does it mean to rationalize the denominator?
- How do you get the square root out of the denominator?
- How do you simplify 4/(square root of 3)?
- Why isn't 4/radical(3) simplified?
- What is an irrational number?
- What is a radical?
- What can you multiply a fraction by to get rid of the square root in the denominator without changing the fraction?
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Staff Review
This lesson does a good job of showing how to eliminate a radical from the denominator of a fraction. This is a very useful skill and is explained very well in this lesson.
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