The expressions \(2n - 1\) and \(2n + 1\) can ... but to prove that it is true all the time we must use algebra. Write the first of the two even numbers as \(2n\), where \(n\) is an integer.

Parsing algebraic expressions is always a pain. If you need to compute, say, 2+4*2, the answer should be the same as (2 + (4 *2)), not ((2 + 4) * 2) — in other words, the right answer is 10 ...

Looking for more on working with and factorising algebraic expressions? Check out our National 5 working with and factorising algebraic expressions Maths guides. National 5 Maths algebraic ...

One or more characters or symbols associated with algebra; for example, A+B=C or A/B. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.