Choosing the Correct Solution

Oct 13, 2025 by windailys.com 89 views

Introduction

Quadratic equations are a fundamental concept in mathematics, and solving them is a crucial skill for students to master. In this article, we will focus on solving the quadratic equation 5a^2 = 980, and we will explore the different methods and techniques used to find the solutions.

What is a Quadratic Equation?

A quadratic equation is a polynomial equation of degree two, which means that the highest power of the variable (in this case, a) is two. The general form of a quadratic equation is:

ax^2 + bx + c = 0

where a, b, and c are constants, and x is the variable. Quadratic equations can be solved using various methods, including factoring, the quadratic formula, and graphing.

The Quadratic Formula

The quadratic formula is a powerful tool for solving quadratic equations. It is given by:

x = (-b ± √(b^2 - 4ac)) / 2a

where a, b, and c are the coefficients of the quadratic equation. The quadratic formula can be used to find the solutions of a quadratic equation, even if it cannot be factored easily.

Solving the Quadratic Equation 5a^2 = 980

To solve the quadratic equation 5a^2 = 980, we can start by dividing both sides of the equation by 5, which gives us:

a^2 = 196

Next, we can take the square root of both sides of the equation, which gives us:

a = ±√196

a = ±14

Therefore, the solutions to the quadratic equation 5a^2 = 980 are a = 14 and a = -14.

Choosing the Correct Solution

Now that we have found the solutions to the quadratic equation, we need to choose the correct answer from the options provided. Let's examine each option carefully:

A. a = 10 or a = -10 B. a = 14 or a = -14 C. a = 2 or a = -2 D. ?

Based on our calculations, we can see that option B is the correct answer. The solutions to the quadratic equation 5a^2 = 980 are indeed a = 14 and a = -14.

Conclusion

Solving quadratic equations is an essential skill for students to master. In this article, we have explored the different methods and techniques used to solve quadratic equations, including the quadratic formula. We have also applied these techniques to solve the quadratic equation 5a^2 = 980, and we have chosen the correct answer from the options provided. By following these steps, students can develop a deeper understanding of quadratic equations and improve their problem-solving skills.

Additional Tips and Resources

To solve quadratic equations, it is essential to have a good understanding of algebraic manipulations, such as factoring and simplifying expressions.
The quadratic formula is a powerful tool for solving quadratic equations, but it can be challenging to apply in certain situations.
Graphing is another method for solving quadratic equations, but it requires a good understanding of graphing techniques and the properties of quadratic functions.
For more practice and review, students can try solving quadratic equations with different coefficients and constants.

Final Answer

The final answer is:

Introduction

Quadratic equations are a fundamental concept in mathematics, and solving them can be a challenging task for many students. In this article, we will address some of the most frequently asked questions about quadratic equations, providing clear and concise answers to help students better understand this important topic.

Q: What is a quadratic equation?

A: A quadratic equation is a polynomial equation of degree two, which means that the highest power of the variable (in this case, a) is two. The general form of a quadratic equation is:

ax^2 + bx + c = 0

where a, b, and c are constants, and x is the variable.

Q: How do I solve a quadratic equation?

A: There are several methods for solving quadratic equations, including:

Factoring: This involves expressing the quadratic equation as a product of two binomials.
The quadratic formula: This is a powerful tool for solving quadratic equations, given by:

x = (-b ± √(b^2 - 4ac)) / 2a

Graphing: This involves plotting the quadratic function on a graph and finding the x-intercepts.

Q: What is the quadratic formula?

A: The quadratic formula is a powerful tool for solving quadratic equations. It is given by:

x = (-b ± √(b^2 - 4ac)) / 2a

where a, b, and c are the coefficients of the quadratic equation.

Q: How do I choose the correct solution?

A: When solving a quadratic equation, you may get two solutions. To choose the correct solution, you need to check if the solutions satisfy the original equation. You can do this by plugging the solutions back into the original equation and checking if it is true.

Q: What is the difference between a quadratic equation and a linear equation?

A: A linear equation is a polynomial equation of degree one, which means that the highest power of the variable (in this case, a) is one. The general form of a linear equation is:

ax + b = 0

where a and b are constants, and x is the variable.

Q: Can I solve a quadratic equation with a negative coefficient?

A: Yes, you can solve a quadratic equation with a negative coefficient. The quadratic formula works for all quadratic equations, regardless of the sign of the coefficient.

Q: How do I simplify a quadratic equation?

A: To simplify a quadratic equation, you can try to factor it, or use the quadratic formula to find the solutions. You can also try to simplify the equation by combining like terms.

Q: What is the relationship between quadratic equations and quadratic functions?

A: Quadratic equations and quadratic functions are related, but they are not the same thing. A quadratic equation is an equation that can be written in the form ax^2 + bx + c = 0, while a quadratic function is a function that can be written in the form f(x) = ax^2 + bx + c.

Q: Can I use a calculator to solve a quadratic equation?

A: Yes, you can use a calculator to solve a quadratic equation. Many calculators have a built-in quadratic formula function that you can use to find the solutions.

Conclusion

Quadratic equations are a fundamental concept in mathematics, and solving them can be a challenging task for many students. By understanding the different methods and techniques used to solve quadratic equations, students can develop a deeper understanding of this important topic. We hope that this Q&A article has provided helpful answers to some of the most frequently asked questions about quadratic equations.

Additional Tips and Resources

To solve quadratic equations, it is essential to have a good understanding of algebraic manipulations, such as factoring and simplifying expressions.
The quadratic formula is a powerful tool for solving quadratic equations, but it can be challenging to apply in certain situations.
Graphing is another method for solving quadratic equations, but it requires a good understanding of graphing techniques and the properties of quadratic functions.
For more practice and review, students can try solving quadratic equations with different coefficients and constants.

Final Answer

There is no final answer to this Q&A article, as it is a collection of frequently asked questions and answers. However, we hope that this article has provided helpful information and resources for students who are struggling with quadratic equations.