Complex Roots of Quadratic Functions

Oct 13, 2025 by windailys.com 60 views

Introduction

When dealing with quadratic functions, it's essential to understand the nature of their roots, especially when they are complex. In this article, we will explore the properties of complex roots and how they relate to the given solution of a quadratic function. We will examine the characteristics of complex roots and determine the correct statement about the given function.

Complex Roots of Quadratic Functions

A quadratic function can be represented in the form $f(x) = ax^2 + bx + c$ , where $a$ , $b$ , and $c$ are real numbers. The roots of a quadratic function are the values of $x$ that satisfy the equation $f(x) = 0$ . When the roots are complex, they can be expressed in the form $x = p + qi$ , where $p$ and $q$ are real numbers and $i$ is the imaginary unit.

Properties of Complex Roots

Complex roots of a quadratic function always come in conjugate pairs. This means that if $x = p + qi$ is a root, then its conjugate $x = p - qi$ is also a root. This property is a result of the complex conjugate root theorem, which states that if a polynomial equation with real coefficients has a complex root, then its conjugate is also a root.

The Given Solution

The given solution to the quadratic function is $\sqrt{7}+5i$ . Since this solution is complex, its conjugate must also be a root of the function. The conjugate of $\sqrt{7}+5i$ is $\sqrt{7}-5i$ .

Determining the Correct Statement

Now that we have identified the conjugate of the given solution, we can determine the correct statement about the given function. The options are:

A. The other solution to function $f$ is $\sqrt{7}-5i$ . B. The other solution to function $f$ is $-\sqrt{7}+5i$ . C. The other solution to function $f$ is $-\sqrt{7}-5i$ . D. The other solution to function $f$ is $5i$ .

Analyzing the Options

Let's analyze each option to determine which one is correct.

Option A: The other solution to function $f$ is $\sqrt{7}-5i$ . This option states that the conjugate of the given solution is the other solution. Since the conjugate of $\sqrt{7}+5i$ is indeed $\sqrt{7}-5i$ , this option is correct.

Option B: The other solution to function $f$ is $-\sqrt{7}+5i$ . This option states that the other solution is the negative of the conjugate of the given solution. However, the conjugate of $\sqrt{7}+5i$ is $\sqrt{7}-5i$ , not $-\sqrt{7}+5i$ . Therefore, this option is incorrect.

Option C: The other solution to function $f$ is $-\sqrt{7}-5i$ . This option states that the other solution is the negative of the given solution. However, the conjugate of $\sqrt{7}+5i$ is $\sqrt{7}-5i$ , not $-\sqrt{7}-5i$ . Therefore, this option is incorrect.

Option D: The other solution to function $f$ is $5i$ . This option states that the other solution is a purely imaginary number. However, the conjugate of $\sqrt{7}+5i$ is $\sqrt{7}-5i$ , not $5i$ . Therefore, this option is incorrect.

Conclusion

Based on the analysis of the options, the correct statement about the given function is:

A. The other solution to function $f$ is $\sqrt{7}-5i$ .

This option states that the conjugate of the given solution is the other solution, which is a property of complex roots of quadratic functions. Therefore, this option is the correct answer.

Final Thoughts

In conclusion, complex roots of quadratic functions always come in conjugate pairs. When given a complex solution, we can determine the other solution by finding its conjugate. In this article, we analyzed the options and determined that the correct statement about the given function is that the other solution is the conjugate of the given solution. This property is essential to understand when dealing with complex roots of quadratic functions.

Introduction

In our previous article, we explored the properties of complex roots of quadratic functions and determined the correct statement about a given solution. In this article, we will provide a Q&A guide to help you better understand complex roots of quadratic functions.

Q: What are complex roots of quadratic functions?

A: Complex roots of quadratic functions are roots that are not real numbers. They can be expressed in the form $x = p + qi$ , where $p$ and $q$ are real numbers and $i$ is the imaginary unit.

Q: Why do complex roots of quadratic functions always come in conjugate pairs?

A: Complex roots of quadratic functions always come in conjugate pairs because of the complex conjugate root theorem. This theorem states that if a polynomial equation with real coefficients has a complex root, then its conjugate is also a root.

Q: What is the conjugate of a complex number?

A: The conjugate of a complex number $x = p + qi$ is $x = p - qi$ . For example, the conjugate of $3 + 4i$ is $3 - 4i$ .

Q: How do I find the conjugate of a complex number?

A: To find the conjugate of a complex number, you simply change the sign of the imaginary part. For example, the conjugate of $2 + 3i$ is $2 - 3i$ .

Q: What is the relationship between the given solution and its conjugate?

A: The given solution and its conjugate are roots of the same quadratic function. They are conjugate pairs, which means that they have the same real part but opposite imaginary parts.

Q: How do I determine the other solution to a quadratic function when given a complex solution?

A: To determine the other solution to a quadratic function when given a complex solution, you need to find the conjugate of the given solution. The conjugate of the given solution is the other solution.

Q: What is the significance of complex roots of quadratic functions?

A: Complex roots of quadratic functions are significant because they can be used to solve quadratic equations. They can also be used to model real-world phenomena, such as population growth and electrical circuits.

Q: Can complex roots of quadratic functions be used to solve real-world problems?

A: Yes, complex roots of quadratic functions can be used to solve real-world problems. For example, they can be used to model population growth, electrical circuits, and other phenomena that involve complex numbers.

Q: What are some common applications of complex roots of quadratic functions?

A: Some common applications of complex roots of quadratic functions include:

Modeling population growth
Analyzing electrical circuits
Solving quadratic equations
Modeling chemical reactions
Analyzing data in physics and engineering

Conclusion

In conclusion, complex roots of quadratic functions are an essential concept in mathematics. They can be used to solve quadratic equations and model real-world phenomena. By understanding complex roots of quadratic functions, you can better analyze and solve problems in mathematics and other fields.

Final Thoughts

We hope this Q&A guide has helped you better understand complex roots of quadratic functions. If you have any further questions or need additional clarification, please don't hesitate to ask.