“Simplify the expression x²-x-20/x²-4:”

"Simplify the expression x²-x-20/x²-4:"
Answer: "(x+5)(x-4)/(x+2)(x-2)"

"Simplifying (x² - x - 20) / (x² - 4) involves factoring the numerator to (x + 5)(x - 4) and the denominator a difference of squares to (x + 2)(x - 2). The simplified form is (x + 5)(x - 4) / (x + 2)(x - 2). This process is fundamental in algebra aiding in solving rational expressions critical for mathematical problem-solving in various fields."