How to Simplify Radical Expressions Involving Fractions?
To simplify radical expressions involving fractions, we have two simple methods.
![How to Simplify Radical Expressions Involving Fractions?](https://www.effortlessmath.com/wp-content/uploads/2022/02/blog-How-to-Simplify-Radical-Expressions-Involving-Fractions-512x240.jpg)
A radical contains an expression that is not a perfect root it is called an irrational number. To rationalize the denominator, you need to get rid of all radicals that are in the denominator.
Related Topics
- How to Rationalize Radical Expressions
- How to Simplify Radical Expressions
- How to Multiply Radical Expressions
A Step-by-Step Guide to Simplifying Radical Expressions Involving Fraction
To simplify radical expressions involving fractions:
- If there is a radical in the denominator, multiply the numerator and denominator by the radical in the denominator.
- If there is a radical and another integer in the denominator, multiply both the numerator and denominator by the conjugate of the denominator.
Simplifying Radical Expressions Involving Fractions – Example 1:
Simplify. \(\frac{1}{\sqrt{7}}\)
Solution:
Multiply by the \(\sqrt{7}\): \(\frac{1}{\sqrt{7}} × \frac{\sqrt{7}}{\sqrt{7}}= \frac{\sqrt{7}} {7}\)
Simplifying Radical Expressions Involving Fractions – Example 2:
Simplify. \(\frac{2}{\sqrt{3}+1}\)
Solution:
Multiply by the conjugate: \(\frac{\sqrt{3}-1} {\sqrt{3}-1}\)
\(\frac{2}{\sqrt{3}+1} × \frac{\sqrt{3}-1} {\sqrt{3}-1}=\frac{2(\sqrt{3}-1)}{2}=\sqrt{3}-1\)
Exercises for Simplifying Radical Expressions Involving Fractions
Simplify radical expressions.
- \(\color{blue}{\frac{1}{\sqrt{6}}}\)
- \(\color{blue}{\frac{5}{\sqrt{3}}}\)
- \(\color{blue}{\frac{3}{\sqrt{7}-1}}\)
- \(\color{blue}{\frac{8}{\sqrt{5}+3}}\)
![This image has an empty alt attribute; its file name is answers.png](https://www.effortlessmath.com/wp-content/uploads/2019/12/answers.png)
- \(\color{blue}{\frac{\sqrt{6}}{6}}\)
- \(\color{blue}{\frac{5\sqrt{3}}{3}}\)
- \(\color{blue}{\frac{\sqrt{7}+1}{2}}\)
- \(\color{blue}{-2\sqrt{5}+6}\)
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