Understanding the Product of Two Expressions

Oct 13, 2025 by wbrum.org 145 views

In mathematics, algebraic expressions are used to represent complex numbers and variables. When dealing with expressions involving square roots, it's essential to apply the correct rules of multiplication to simplify them. In this article, we will explore the product of two expressions involving square roots and determine the correct answer.

Understanding the Product of Two Expressions

The given product is ${$ (\sqrt{14} - \sqrt{3})(\sqrt{12} + \sqrt{7})$}$. To simplify this expression, we need to apply the distributive property, which states that for any real numbers a, b, and c, a(b + c) = ab + ac.

Applying the Distributive Property

Let's start by applying the distributive property to the given product:

${$ (\sqrt{14} - \sqrt{3})(\sqrt{12} + \sqrt{7})$}$

= ${$ \sqrt{14}(\sqrt{12} + \sqrt{7}) - \sqrt{3}(\sqrt{12} + \sqrt{7})$}$

Now, we can simplify each term separately:

= ${$ \sqrt{14}(\sqrt{12}) + \sqrt{14}(\sqrt{7}) - \sqrt{3}(\sqrt{12}) - \sqrt{3}(\sqrt{7})$}$

= ${$ \sqrt{168} + \sqrt{98} - \sqrt{36} - \sqrt{21}$}$

Simplifying the Square Roots

Now, let's simplify the square roots:

= ${$ \sqrt{168} + \sqrt{98} - 6 - \sqrt{21}$}$

= ${$ \sqrt{4 \cdot 42} + \sqrt{49 \cdot 2} - 6 - \sqrt{21}$}$

= ${ $2\sqrt{42} + 7\sqrt{2} - 6 - \sqrt{21}\$}$

Conclusion

Based on the simplification of the given product, we can conclude that the correct answer is:

A. ${ $2 \sqrt{42} + 7 \sqrt{2} - 6 - \sqrt{21}\$}$

This answer is obtained by applying the distributive property and simplifying the square roots. The other options, B and C, do not match the simplified expression.

Discussion

The product of two expressions involving square roots can be simplified using the distributive property. By applying this property and simplifying the square roots, we can determine the correct answer. In this case, the correct answer is option A.

Common Mistakes

When dealing with expressions involving square roots, it's essential to apply the correct rules of multiplication. One common mistake is to forget to apply the distributive property, which can lead to incorrect simplifications. Another mistake is to simplify the square roots incorrectly, which can result in incorrect answers.

Tips and Tricks

To simplify expressions involving square roots, it's essential to apply the distributive property and simplify the square roots correctly. Here are some tips and tricks to help you:

Always apply the distributive property when dealing with expressions involving square roots.
Simplify the square roots by finding the largest perfect square that divides the number under the square root.
Use the properties of square roots, such as ${$ \sqrt{a} \cdot \sqrt{b} = \sqrt{ab}$}$, to simplify expressions.

By following these tips and tricks, you can simplify expressions involving square roots and determine the correct answer.

Conclusion

In this article, we will address some of the most frequently asked questions related to the product of two expressions involving square roots.

Q: What is the distributive property?

A: The distributive property is a mathematical rule that states that for any real numbers a, b, and c, a(b + c) = ab + ac. This property is used to simplify expressions involving square roots.

Q: How do I apply the distributive property to expressions involving square roots?

A: To apply the distributive property to expressions involving square roots, you need to multiply each term in the first expression by each term in the second expression. This will result in a simplified expression.

Q: What are some common mistakes to avoid when simplifying expressions involving square roots?

A: Some common mistakes to avoid when simplifying expressions involving square roots include:

Forgetting to apply the distributive property
Simplifying the square roots incorrectly
Not using the properties of square roots, such as ${$ \sqrt{a} \cdot \sqrt{b} = \sqrt{ab}$}$

Q: How do I simplify square roots?

A: To simplify square roots, you need to find the largest perfect square that divides the number under the square root. This will result in a simplified expression.

Q: What are some tips and tricks for simplifying expressions involving square roots?

A: Some tips and tricks for simplifying expressions involving square roots include:

Always apply the distributive property
Simplify the square roots by finding the largest perfect square that divides the number under the square root
Use the properties of square roots, such as ${$ \sqrt{a} \cdot \sqrt{b} = \sqrt{ab}$}$

Q: Can you provide an example of how to simplify an expression involving square roots?

A: Let's consider the expression ${$ (\sqrt{14} - \sqrt{3})(\sqrt{12} + \sqrt{7})$}$. To simplify this expression, we need to apply the distributive property and simplify the square roots.

= ${$ \sqrt{14}(\sqrt{12} + \sqrt{7}) - \sqrt{3}(\sqrt{12} + \sqrt{7})$}$

= ${$ \sqrt{14}(\sqrt{12}) + \sqrt{14}(\sqrt{7}) - \sqrt{3}(\sqrt{12}) - \sqrt{3}(\sqrt{7})$}$

= ${$ \sqrt{168} + \sqrt{98} - \sqrt{36} - \sqrt{21}$}$

= ${$ \sqrt{4 \cdot 42} + \sqrt{49 \cdot 2} - 6 - \sqrt{21}$}$

= ${ $2\sqrt{42} + 7\sqrt{2} - 6 - \sqrt{21}\$}$

Q: What is the correct answer to the given product?

A: The correct answer to the given product is option A: ${ $2 \sqrt{42} + 7 \sqrt{2} - 6 - \sqrt{21}\$}$ .

Conclusion

In conclusion, the product of two expressions involving square roots can be simplified using the distributive property. By applying this property and simplifying the square roots, we can determine the correct answer. We hope that this article has provided you with a better understanding of how to simplify expressions involving square roots and has addressed some of the most frequently asked questions related to this topic.