\[ \begin{array}{l} \frac{x^{6}}{x^{4}}=x^{2} \quad \frac{20 x}{x^{4}}=\frac{7-1 x^{5}}{x^{4}}=x^{1} \quad \frac{-1 x^{4}}{x^{4}}=x \quad \frac{-1 x^{-3}}{x^{4}}=-x \\ x^{6}+6 x^{3}-2 x^{5}-7 x^{2}-4 x+6 \text { entre } x^{4}-3 x^{2}+2 \\ \begin{array}{rccc} x^{6} & -2 x^{5} & 0 \\ -x^{6} & +3 x^{5} & -2 x^{4} \\ -x^{5} & +6 x^{3} & -7 x^{2} \quad-4 x+6 \frac{x^{4}-3 x^{2}}{x^{2} 1 x} \\ 20 x^{3} \end{array} \end{array} \]
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Did you know that the process of simplifying rational expressions like this one has roots in ancient mathematics? The Egyptians and Babylonians were already utilizing algebraic concepts over 4,000 years ago! They used their own methods for calculations that resemble the principles of simplifying fractions and solving equations we use today. In real-world applications, algebra plays a crucial role in fields like engineering and economics where we often deal with polynomials and rational expressions. For instance, engineers use polynomial functions to model and predict the behavior of structures under various loads, ensuring safety and efficiency in design. Understanding how to manipulate these expressions allows for the development of reliable and cost-effective solutions!