(Q9.) Simplify and Combine Expressions with Cube Roots | Summary and Q&A

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October 24, 2015
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(Q9.) Simplify and Combine Expressions with Cube Roots

TL;DR

Learn how to simplify and combine radical expressions by breaking them down into perfect cubes and applying mathematical operations.

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Q: How do you simplify and combine radical expressions?

To simplify and combine radical expressions, you need to break them down into their perfect cube components and apply mathematical operations, such as multiplication and addition/subtraction. By using the known perfect cubes, you can simplify the expressions effectively.

Q: What are some perfect cubes you can use to simplify radical expressions?

Some perfect cubes you can use are 1, 8, and 27. By identifying these perfect cubes, you can break down a given radical expression and simplify it accordingly. For example, the cube root of 8 is equal to 2.

Q: Can you provide an example of simplifying a radical expression?

Sure! Let's consider the cube root of 16. Since 8 is a perfect cube that goes into 16, we can break down the expression into the cube root of 8 multiplied by the cube root of 2. This simplifies the expression to the cube root of 16.

Q: How do you combine like terms when simplifying radical expressions?

When you have like terms with the same radical expression, you can combine them by performing the operation indicated by the math symbol in front of them. For example, if you have -10 cube root of 2 and -3 cube root of 2, you can combine them to get -13 cube root of 2.

Summary & Key Takeaways

• The content explains the process of simplifying and combining radical expressions, specifically focusing on cube roots.

• It provides examples of perfect cubes, such as 1, 8, and 27, and shows how to break down a radical expression using these perfect cubes.

• The video demonstrates how to simplify and combine radical expressions using multiplication and addition/subtraction.