expansions

In mathematics, an expansion is a way of rewriting a number or expression in a different form that reveals its structure. For example, a decimal expansion breaks a number into digits after the decimal point, like 0.75. Polynomial expansions, like binomial or Taylor expansions, express complex functions as sums of simpler parts, making calculations easier. Essentially, expansions help us understand, approximate, or work with numbers and functions more effectively by breaking them down into more manageable components.