In algebra, letters are used to stand for values that can change (variables) or for values that are not known (unknowns). A term is a number or letter on its own, or numbers and letters multiplied ...

For example, in the expression \(3(m + 7)\) both ... Expanding brackets involves using the skills of simplifying algebra. Remember that \(2 \times a = 2a\) and \(a \times a = a^2\).