Applying the Distributive Property to the Given Expression

Oct 13, 2025 by talynt.org 1 views

The distributive property is a fundamental concept in algebra that allows us to expand expressions by multiplying each term inside the parentheses with the term outside. In this article, we will explore the distributive property and apply it to the given expression: $-2x(x-4)$ . We will examine each option and determine which one represents the correct use of the distributive property.

What is the Distributive Property?

The distributive property is a mathematical concept that states that for any real numbers $a$ , $b$ , and $c$ , the following equation holds:

$a(b+c) = ab + ac$

This property allows us to expand expressions by multiplying each term inside the parentheses with the term outside. In other words, we can distribute the term outside the parentheses to each term inside.

Applying the Distributive Property to the Given Expression

Now, let's apply the distributive property to the given expression: $-2x(x-4)$ . To do this, we need to multiply the term outside the parentheses, $-2x$ , with each term inside the parentheses, $x$ and $-4$ .

Step 1: Multiply $-2x$ with $x$

When we multiply $-2x$ with $x$ , we get:

$-2x \cdot x = -2x^2$

Step 2: Multiply $-2x$ with $-4$

When we multiply $-2x$ with $-4$ , we get:

$-2x \cdot -4 = 8x$

Combining the Results

Now, let's combine the results from the previous steps:

$-2x(x-4) = -2x^2 + 8x$

Evaluating the Options

Now that we have applied the distributive property to the given expression, let's evaluate each option:

A. $-x-4$

This option is incorrect because it does not represent the correct use of the distributive property. When we multiply $-2x$ with $x$ , we get $-2x^2$ , not $-x$ . Similarly, when we multiply $-2x$ with $-4$ , we get $8x$ , not $-4$ .

B. $-2x^2+8$

This option is incorrect because it is missing the term $8x$ . When we multiply $-2x$ with $-4$ , we get $8x$ , not just $8$ .

C. $-2x^2+8x$

This option is correct because it represents the correct use of the distributive property. When we multiply $-2x$ with $x$ , we get $-2x^2$ , and when we multiply $-2x$ with $-4$ , we get $8x$ .

D. $-2x^2-8x$

This option is incorrect because it is missing the positive term $8x$ . When we multiply $-2x$ with $-4$ , we get $8x$ , not $-8x$ .

Conclusion

In conclusion, the correct use of the distributive property for the given expression $-2x(x-4)$ is:

$-2x(x-4) = -2x^2 + 8x$

This result is obtained by multiplying the term outside the parentheses, $-2x$ , with each term inside the parentheses, $x$ and $-4$ . The correct use of the distributive property is essential in algebra to expand expressions and simplify equations.

Common Mistakes to Avoid

When applying the distributive property, it is essential to avoid common mistakes such as:

Forgetting to multiply each term inside the parentheses with the term outside.
Multiplying the term outside the parentheses with only one term inside.
Ignoring the sign of the term outside the parentheses.

By avoiding these common mistakes, you can ensure that you are using the distributive property correctly and obtaining the correct results.

Practice Problems

To practice applying the distributive property, try the following problems:

Simplify the expression: $3(x+2)$
Simplify the expression: $-4(x-1)$
Simplify the expression: $2(x+3)$

Remember to apply the distributive property by multiplying the term outside the parentheses with each term inside the parentheses.

Final Thoughts

The distributive property is a fundamental concept in algebra that can be challenging to understand and apply. In this article, we will address some of the most frequently asked questions about the distributive property.

Q: What is the distributive property?

A: The distributive property is a mathematical concept that states that for any real numbers $a$ , $b$ , and $c$ , the following equation holds:

$a(b+c) = ab + ac$

This property allows us to expand expressions by multiplying each term inside the parentheses with the term outside.

Q: How do I apply the distributive property?

A: To apply the distributive property, follow these steps:

Identify the term outside the parentheses.
Multiply the term outside the parentheses with each term inside the parentheses.
Combine the results to form a single expression.

Q: What are some common mistakes to avoid when applying the distributive property?

A: Some common mistakes to avoid when applying the distributive property include:

Forgetting to multiply each term inside the parentheses with the term outside.
Multiplying the term outside the parentheses with only one term inside.
Ignoring the sign of the term outside the parentheses.

Q: How do I simplify expressions using the distributive property?

A: To simplify expressions using the distributive property, follow these steps:

Identify the term outside the parentheses.
Multiply the term outside the parentheses with each term inside the parentheses.
Combine the results to form a single expression.

Q: Can I use the distributive property with negative numbers?

A: Yes, you can use the distributive property with negative numbers. When multiplying a negative number with a positive number, the result is negative. When multiplying two negative numbers, the result is positive.

Q: Can I use the distributive property with fractions?

A: Yes, you can use the distributive property with fractions. When multiplying a fraction with a fraction, multiply the numerators and denominators separately.

Q: How do I apply the distributive property to expressions with exponents?

A: To apply the distributive property to expressions with exponents, follow these steps:

Identify the term outside the parentheses.
Multiply the term outside the parentheses with each term inside the parentheses, including the exponents.
Combine the results to form a single expression.

Q: Can I use the distributive property to simplify complex expressions?

A: Yes, you can use the distributive property to simplify complex expressions. By breaking down the expression into smaller parts and applying the distributive property, you can simplify the expression and make it easier to work with.

Q: How do I check my work when applying the distributive property?

A: To check your work when applying the distributive property, follow these steps:

Multiply the term outside the parentheses with each term inside the parentheses.
Combine the results to form a single expression.
Simplify the expression by combining like terms.
Check your work by plugging in values or using a calculator.

Conclusion

The distributive property is a fundamental concept in algebra that can be challenging to understand and apply. By following the steps outlined in this article and practicing regularly, you can become more confident in your ability to apply the distributive property and simplify expressions. Remember to avoid common mistakes and check your work to ensure accuracy.

Practice Problems

To practice applying the distributive property, try the following problems:

Simplify the expression: $3(x+2)$
Simplify the expression: $-4(x-1)$
Simplify the expression: $2(x+3)$

Remember to apply the distributive property by multiplying the term outside the parentheses with each term inside the parentheses.

Final Thoughts

The distributive property is a powerful tool in algebra that can help you simplify expressions and solve problems more efficiently. By understanding the distributive property and practicing regularly, you can become more confident in your ability to apply it and simplify complex expressions.