Determining the Width of the Area Model

Oct 13, 2025 by wbrum.org 138 views

Introduction

In mathematics, factoring is a crucial concept that helps us simplify algebraic expressions and solve equations. Heng, a math enthusiast, was trying to factor the quadratic expression $10x^2 + 5x$ . She discovered that the greatest common factor (GCF) of these terms was $5x$ and created an area model to visualize the process. In this article, we will delve into Heng's area model and determine the width of her model.

The Greatest Common Factor (GCF)

The GCF of two or more terms is the largest expression that divides each term without leaving a remainder. In the case of $10x^2 + 5x$ , the GCF is $5x$ . This means that both terms can be divided by $5x$ without leaving a remainder.

Area Model: A Visual Representation

An area model is a visual representation of an algebraic expression. It helps us understand the relationships between the terms and how they can be factored. In Heng's case, she created an area model to factor the expression $10x^2 + 5x$ .

Step 1: Identify the GCF

The first step in creating an area model is to identify the GCF of the terms. In this case, the GCF is $5x$ .

Step 2: Draw the Area Model

Once we have identified the GCF, we can draw the area model. The area model consists of two rectangles: one with an area of $10x^2$ and another with an area of $5x$ .

Step 3: Factor the Expression

Now that we have the area model, we can factor the expression. We can see that both rectangles have a common factor of $5x$ . Therefore, we can factor out $5x$ from both rectangles.

Determining the Width of the Area Model

The width of the area model is the value that we multiply by the GCF to get the original expression. In this case, the GCF is $5x$ , and the original expression is $10x^2 + 5x$ . To find the width, we need to divide the original expression by the GCF.

Step 1: Divide the Original Expression by the GCF

To find the width, we need to divide the original expression by the GCF. We can do this by dividing $10x^2 + 5x$ by $5x$ .

Step 2: Simplify the Expression

Once we have divided the original expression by the GCF, we can simplify the expression. We can see that $10x^2$ divided by $5x$ is $2x$ , and $5x$ divided by $5x$ is $1$ .

Step 3: Determine the Width

Now that we have simplified the expression, we can determine the width of the area model. The width is the value that we multiplied by the GCF to get the original expression. In this case, the width is $2x + 1$ .

Conclusion

In conclusion, Heng's area model helps us understand the relationships between the terms and how they can be factored. By identifying the GCF and drawing the area model, we can factor the expression $10x^2 + 5x$ . The width of the area model is the value that we multiply by the GCF to get the original expression. In this case, the width is $2x + 1$ .

Final Answer

The width of Heng's area model is $\boxed{2x + 1}$ .

References

[1] Khan Academy. (n.d.). Factoring Quadratic Expressions. Retrieved from https://www.khanacademy.org/math/algebra/x2factors/x2factors
[2] Mathway. (n.d.). Factoring Quadratic Expressions. Retrieved from https://www.mathway.com/subjects/Algebra/Factoring-Quadratic-Expressions

Additional Resources

[1] Algebra.com. (n.d.). Factoring Quadratic Expressions. Retrieved from https://www.algebra.com/algebra/homework/factoring-quadratic/factoring-quadratic.html
[2] Purplemath. (n.d.). Factoring Quadratic Expressions. Retrieved from https://www.purplemath.com/modules/factsquad.htm
Heng's Area Model: A Q&A Guide =====================================

Introduction

In our previous article, we explored Heng's area model and determined the width of her model. In this article, we will answer some frequently asked questions about Heng's area model and provide additional insights into the concept.

Q&A

Q: What is the greatest common factor (GCF) of the terms in Heng's area model?

A: The GCF of the terms in Heng's area model is $5x$ .

Q: How do you draw an area model?

A: To draw an area model, you need to identify the GCF of the terms and then draw two rectangles: one with an area of $10x^2$ and another with an area of $5x$ .

Q: How do you factor the expression using an area model?

A: To factor the expression using an area model, you need to identify the GCF and then factor it out from both rectangles.

Q: What is the width of Heng's area model?

A: The width of Heng's area model is $2x + 1$ .

Q: How do you determine the width of an area model?

A: To determine the width of an area model, you need to divide the original expression by the GCF and then simplify the expression.

Q: What are some common mistakes to avoid when creating an area model?

A: Some common mistakes to avoid when creating an area model include:

Not identifying the GCF correctly
Not drawing the rectangles correctly
Not factoring the expression correctly
Not simplifying the expression correctly

Q: How can I practice creating area models?

A: You can practice creating area models by:

Working on sample problems
Creating your own area models
Using online resources and tools
Asking a teacher or tutor for help

Additional Tips and Resources

Make sure to identify the GCF correctly before creating an area model.
Use a ruler or other straightedge to draw the rectangles correctly.
Factor the expression carefully to avoid mistakes.
Simplify the expression carefully to avoid mistakes.
Practice creating area models regularly to improve your skills.