December 11, 2023 # x²-11x+28=0: Mathematical Solution

Welcome to an exploration of quadratic equations, an integral part of algebra and mathematics. In this article, we will delve into the world of quadratic equations, with a particular focus on the equation x²-11x+28=0. Throughout this comprehensive discussion, we will uncover the general concept of quadratic equations, explore a range of methods to solve them, and conduct a deep dive into a specific case study to understand the practical applications of these equations.

### What is a Quadratic Equation?

To embark on this journey, we must first grasp the essence of a quadratic equation. A quadratic equation is a second-degree polynomial equation, characterized by the squared variable. The most fundamental form of a quadratic equation is expressed as:

### ax^2 + bx + c = 0

In this equation, ‘a,’ ‘b,’ and ‘c’ represent coefficients, while ‘x’ stands for the variable. The equationx²-11x+28=0 precisely aligns with this standard form.

### General Form of a Quadratic Equation

Understanding the general form of a quadratic equation is pivotal as it underpins the foundation of these equations. By recognizing this structure, we can conveniently identify the coefficients ‘a,’ ‘b,’ and ‘c.’ For our specific equation, ‘a’ is 1, ‘b’ is -11, and ‘c’ is 28. Quadratic equations are a realm of mathematical problems that can be tackled using various methods. Let’s explore two prominent techniques:

### Factoring

Factoring is a method employed to solve quadratic equations that can be be easily broken down. However, for equations as complex as x²-11x+28=0, factoring may not be the most straightforward approach.

The quadratic formula emerges as a versatile and universally applicable approach to solving quadratic equations. This formula, often called upon, is:

### x = (-b ± √(b^2 – 4ac)) / 2a

With this formula, we obtain the roots of the equation, representing the values of ‘x’ that render the equation equal to zero.

## x^2-11x+28=0: A Case Study

Intriguingly, we now turn our attention to the specific equation x2-11x+28=0. Our exploration will involve a step-by-step analysis using the quadratic formula.

### Step 1: Identifying the Coefficients

To initiate this journey, we must first identify the coefficients. In the equation at hand, ‘a’ is 1, ‘b’ is -11, and ‘c’ is 28.

### Step 2: Applying the Quadratic Formula

With the coefficients now in our grasp, we can proceed to apply the quadratic formula. The equation takes shape as follows:

x = (-(-11) ± √((-11)^2 – 4 * 1 * 28)) / (2 * 1)

In the pursuit of a solution, we simplify the equation, leading to:

x = (11 ± √(121 – 112)) / 2

x = (11 ± √9) / 2

### Step 3: Finding the Roots

As the equation begins to crystallize, we uncover two potential solutions:

1. x = (11 + 3) / 2 = 7
2. x = (11 – 3) / 2 = 4

Thus, the roots of the equation x2-11x+28=0 are revealed as x = 7 and x = 4.

## Graphical Representation of Quadratic Equations

In the realm of quadratic equations, the graphical depiction often takes the form of a parabola. This U-shaped curve provides vital insights into the behavior of these equations, with the vertex being a central point, signifying either the minimum or maximum of the parabola. 