1. The symbol \(\Delta\) (Delta) is commonly used in mathematics and science to represent a change or difference in a quantity. 2. For example, if you have a variable \(x\), then \(\Delta x\) means the change in \(x\), calculated as \(\Delta x = x_{final} - x_{initial}\). 3. This concept is used in many contexts, such as in algebra, physics, and calculus, to denote how much a quantity has changed between two points. 4. So, \(\Delta\) is not a fixed number but a symbol indicating a difference or change in values.