Applying the Properties to Variable Expressions

Oct 13, 2025 by windailys.com 136 views

Introduction

In mathematics, the cubic root of a number is a value that, when multiplied by itself three times, gives the original number. When dealing with variable expressions, solving the cubic root can be a bit more complex. In this article, we will explore how to solve the cubic root of a variable expression, using the given problem as an example.

Understanding the Problem

The given problem is to find the value of $$\sqrt[3]{125 x^{12}}$$. To solve this, we need to understand the properties of cubic roots and how to apply them to variable expressions.

Properties of Cubic Roots

The cubic root of a number is denoted by the symbol $$\sqrt[3]{x}$$. When we take the cubic root of a number, we are essentially finding a value that, when multiplied by itself three times, gives the original number. For example, $$\sqrt[3]{27} = 3$$, because $$3 \times 3 \times 3 = 27$$.

Applying the Properties to Variable Expressions

When dealing with variable expressions, we need to apply the properties of cubic roots in a similar way. In the given problem, we have $$\sqrt[3]{125 x^{12}}$$. To solve this, we can start by breaking down the expression into its prime factors.

Breaking Down the Expression

The expression $$125 x^{12}$$ can be broken down into its prime factors as follows:

125 x^{12} = 5^3 \times x^{12}

Applying the Properties of Cubic Roots

Now that we have broken down the expression into its prime factors, we can apply the properties of cubic roots. When we take the cubic root of a number, we can take the cubic root of each factor separately. In this case, we can take the cubic root of $$5^3$$ and $$x^{12}$$ separately.

Solving the Cubic Root of the Factors

The cubic root of $$5^3$$ is $$5$$, because $$5 \times 5 \times 5 = 5^3$$. The cubic root of $$x^{12}$$ is $$x^4$$, because $$x^4 \times x^4 \times x^4 = x^{12}$$.

Combining the Results

Now that we have solved the cubic root of each factor, we can combine the results to get the final answer. The cubic root of $$125 x^{12}$$ is $$5 x^4$$.

Conclusion

In this article, we have explored how to solve the cubic root of a variable expression using the given problem as an example. We have broken down the expression into its prime factors, applied the properties of cubic roots, and solved the cubic root of each factor separately. The final answer is $$5 x^4$$.

Answer

The correct answer is B. $$5 x^4$$.

Additional Examples

Here are a few additional examples to help illustrate the concept:

$\sqrt[3]{64 x^9} = 4 x^3$
$\sqrt[3]{27 x^{18}} = 3 x^6$
$\sqrt[3]{125 x^{24}} = 5 x^8$

Tips and Tricks

Here are a few tips and tricks to help you solve cubic roots of variable expressions:

Break down the expression into its prime factors.
Apply the properties of cubic roots to each factor separately.
Solve the cubic root of each factor using the properties of exponents.
Combine the results to get the final answer.

Q: What is the cubic root of a variable expression?

A: The cubic root of a variable expression is a value that, when multiplied by itself three times, gives the original expression. In other words, it is the value that, when raised to the power of 3, gives the original expression.

Q: How do I solve the cubic root of a variable expression?

A: To solve the cubic root of a variable expression, you need to break down the expression into its prime factors, apply the properties of cubic roots to each factor separately, and solve the cubic root of each factor using the properties of exponents.

Q: What are the properties of cubic roots?

A: The properties of cubic roots are as follows:

The cubic root of a number is denoted by the symbol $$\sqrt[3]{x}$$.
When we take the cubic root of a number, we are essentially finding a value that, when multiplied by itself three times, gives the original number.
The cubic root of a number can be written as $$x^{1/3}$$.

Q: How do I apply the properties of cubic roots to variable expressions?

A: To apply the properties of cubic roots to variable expressions, you need to break down the expression into its prime factors and apply the properties of cubic roots to each factor separately.

Q: What is the difference between the cubic root and the square root?

A: The cubic root and the square root are both roots of a number, but they are different. The square root of a number is a value that, when multiplied by itself, gives the original number. The cubic root of a number is a value that, when multiplied by itself three times, gives the original number.

Q: Can I use the properties of exponents to solve the cubic root of a variable expression?

A: Yes, you can use the properties of exponents to solve the cubic root of a variable expression. When you take the cubic root of a number, you can take the cubic root of each factor separately and use the properties of exponents to simplify the expression.

Q: What are some common mistakes to avoid when solving the cubic root of a variable expression?

A: Some common mistakes to avoid when solving the cubic root of a variable expression include:

Not breaking down the expression into its prime factors.
Not applying the properties of cubic roots to each factor separately.
Not using the properties of exponents to simplify the expression.

Q: Can I use a calculator to solve the cubic root of a variable expression?

A: Yes, you can use a calculator to solve the cubic root of a variable expression. However, it is always a good idea to check your work by hand to make sure that the calculator is giving you the correct answer.

Q: How do I check my work when solving the cubic root of a variable expression?

A: To check your work when solving the cubic root of a variable expression, you need to plug your answer back into the original expression and make sure that it is true. You can also use a calculator to check your work.

Q: What are some real-world applications of solving the cubic root of a variable expression?

A: Solving the cubic root of a variable expression has many real-world applications, including:

Calculating the volume of a cube.
Finding the length of a side of a cube.
Determining the amount of material needed to build a cube.

By following these tips and avoiding common mistakes, you should be able to solve the cubic root of a variable expression with ease.