4.1.4.

Let’s dive into the fun world of expanding ! When you square a binomial, you apply the formula . Here, is and is . So, squaring it up gives us .

Now you can see how this little expression transforms into a lovely quadratic! Quadratics like this are useful in various real-world scenarios, such as calculating areas of squares with changing side lengths or optimizing profit margins in business by finding maximum revenue. Quadratics are key players in many real-life applications!