Imaginary Numbers and the Quadratic Equation

Introduction

Take a look at the following equation:

$$x^2 - 4 = 0.$$

This is a simple example of a quadratic equation.

Notice $x^2$ is the highest power of $x$ that appears in the equation.

That is what makes it a quadratic equation.

These equations arise frequently in the mathematical sciences, and $x$ can represent anything.

For example: the number of ducks in a pon

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