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# Parts of a radical expression

Updated: 4/28/2022

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15y ago

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15y ago

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Q: Parts of a radical expression
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### Can you Define and explain radical expressions?

A rational expression is an expression that contains a radical, i.e., a root.

### What are radical expressions in math?

A radical expression is an expression that involves a square root, cubic root, etc.

### What is the importance of the conjugate in rationalizing the denominator of a rational expression that has a radical expression in the denominator?

To eliminate the radical in the denominator.

### How are radical expression's simplified?

The details depend on the specific radical expression. Normally, you'll want to: * Avoid a perfect square under a radical sign. Take it out, by separating the radical into two parts. Example: root (x squared y) = root (x squared) x root (y) = x root (y). * Avoid a radical sign in the denominator. If you multiply numerator and denominator by the same square root, you get an expression in which there are roots in the numerator, but not in the denominator.