This involves mulitplying each term inside the bracket by the number/letter outside the bracket or inside a second bracket

The opposite of multiplying out brackets, involves putting the expression into bracket(s)

An equation that expresses a mathematical relationship between two or more variables

A number in a sequence

The term to term rule is a constant number and the nth term rule just involves “n”

Generally a quadratic sequence where you need to find the 2nd difference and the nth term rule will involve “n2”