Combining the Numbers and Exponents

Oct 13, 2025 by wbrum.org 137 views

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Understanding the Problem

The given problem involves simplifying the product of two cube roots. We are required to find the simplified product of $\sqrt[3]{9 x^4}$ and $\sqrt[3]{3 x^8}$ . To solve this problem, we need to apply the properties of cube roots and exponents.

Properties of Cube Roots

The cube root of a number is a value that, when multiplied by itself twice, gives the original number. In mathematical terms, $\sqrt[3]{a} \cdot \sqrt[3]{a} \cdot \sqrt[3]{a} = a$ . This property can be extended to the product of two or more cube roots.

Simplifying the Product

To simplify the product of $\sqrt[3]{9 x^4}$ and $\sqrt[3]{3 x^8}$ , we can use the property of multiplying cube roots. When we multiply two cube roots, we can combine the numbers inside the cube roots and add the exponents of the variables.

$\sqrt[3]{9 x^4} \cdot \sqrt[3]{3 x^8} = \sqrt[3]{9 \cdot 3 \cdot x^4 \cdot x^8}$

Combining the Numbers and Exponents

Now, we can combine the numbers inside the cube root and add the exponents of the variables.

$\sqrt[3]{9 \cdot 3 \cdot x^4 \cdot x^8} = \sqrt[3]{27 \cdot x^{4+8}}$

Simplifying the Expression

The expression inside the cube root can be simplified further.

$\sqrt[3]{27 \cdot x^{4+8}} = \sqrt[3]{27 \cdot x^{12}}$

Final Answer

The simplified product of $\sqrt[3]{9 x^4}$ and $\sqrt[3]{3 x^8}$ is $\sqrt[3]{27 x^{12}}$ .

Comparison with the Options

Now, let's compare the simplified product with the given options.

Option A: $\sqrt[3]{12 x^{12}}$
Option B: $\sqrt[3]{27 x^{12}}$
Option C: $3 x^4$
Option D: $9 x^6$

The simplified product matches with option B: $\sqrt[3]{27 x^{12}}$ .

Conclusion

In this article, we have simplified the product of two cube roots using the properties of cube roots and exponents. We have shown that the simplified product is $\sqrt[3]{27 x^{12}}$ , which matches with option B. This problem requires a good understanding of the properties of cube roots and exponents, and it is an important concept in mathematics.

Frequently Asked Questions

Q: What is the property of multiplying cube roots?

A: When we multiply two cube roots, we can combine the numbers inside the cube roots and add the exponents of the variables.

Q: How do we simplify the product of two cube roots?

A: We can use the property of multiplying cube roots and combine the numbers inside the cube roots and add the exponents of the variables.

Q: What is the final answer to the problem?

A: The final answer is $\sqrt[3]{27 x^{12}}$ .

Q: Which option matches with the simplified product?

A: Option B: $\sqrt[3]{27 x^{12}}$ matches with the simplified product.

Key Takeaways

The property of multiplying cube roots is used to simplify the product of two cube roots.
The numbers inside the cube roots can be combined and the exponents of the variables can be added.
The final answer is $\sqrt[3]{27 x^{12}}$ .
Option B: $\sqrt[3]{27 x^{12}}$ matches with the simplified product.

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Q&A: Simplifying the Product of Cube Roots

Q: What is the property of multiplying cube roots?

A: When we multiply two cube roots, we can combine the numbers inside the cube roots and add the exponents of the variables. This property is used to simplify the product of two cube roots.

Q: How do we simplify the product of two cube roots?

A: To simplify the product of two cube roots, we can use the property of multiplying cube roots. We combine the numbers inside the cube roots and add the exponents of the variables. This will give us the simplified product of the two cube roots.

Q: What is the formula for simplifying the product of two cube roots?

A: The formula for simplifying the product of two cube roots is:

$\sqrt[3]{a} \cdot \sqrt[3]{b} = \sqrt[3]{ab}$

where $a$ and $b$ are the numbers inside the cube roots.

Q: How do we add exponents when simplifying the product of two cube roots?

A: When simplifying the product of two cube roots, we add the exponents of the variables. For example, if we have $\sqrt[3]{x^2} \cdot \sqrt[3]{x^5}$ , we can add the exponents to get $\sqrt[3]{x^{2+5}} = \sqrt[3]{x^7}$ .

Q: What is the final answer to the problem?

A: The final answer to the problem is $\sqrt[3]{27 x^{12}}$ .

Q: Which option matches with the simplified product?

A: Option B: $\sqrt[3]{27 x^{12}}$ matches with the simplified product.

Q: Can we simplify the product of cube roots with negative exponents?

A: Yes, we can simplify the product of cube roots with negative exponents. When we have a negative exponent, we can rewrite it as a positive exponent by taking the reciprocal of the number. For example, if we have $\sqrt[3]{x^{-2}} \cdot \sqrt[3]{x^5}$ , we can rewrite the negative exponent as a positive exponent by taking the reciprocal of the number: $\sqrt[3]{x^{-2}} = \frac{1}{\sqrt[3]{x^2}}$ .

Q: How do we simplify the product of cube roots with fractional exponents?

A: When we have a fractional exponent, we can simplify the product of cube roots by using the property of fractional exponents. For example, if we have $\sqrt[3]{x^{\frac{1}{2}}} \cdot \sqrt[3]{x^{\frac{3}{2}}}$ , we can simplify the product by using the property of fractional exponents: $\sqrt[3]{x^{\frac{1}{2}}} \cdot \sqrt[3]{x^{\frac{3}{2}}} = \sqrt[3]{x^{\frac{1}{2} + \frac{3}{2}}} = \sqrt[3]{x^2}$ .

Key Takeaways

The property of multiplying cube roots is used to simplify the product of two cube roots.
The numbers inside the cube roots can be combined and the exponents of the variables can be added.
The final answer is $\sqrt[3]{27 x^{12}}$ .
Option B: $\sqrt[3]{27 x^{12}}$ matches with the simplified product.
We can simplify the product of cube roots with negative exponents by rewriting the negative exponent as a positive exponent.
We can simplify the product of cube roots with fractional exponents by using the property of fractional exponents.

Conclusion

In this article, we have answered some frequently asked questions about simplifying the product of cube roots. We have discussed the property of multiplying cube roots, how to simplify the product of two cube roots, and how to add exponents when simplifying the product of two cube roots. We have also discussed how to simplify the product of cube roots with negative exponents and fractional exponents.