GCSE Secondary Maths Age 13-17 - Algebra: Proof - Explained

The video tutorial explains how to prove algebraically that the expression n^2 - (n-2)^2 is always even. It begins by expanding the expression, simplifying it by collecting like terms, and then factorizing it to show that it is always even. The tutorial emphasizes careful handling of minus signs and provides a breakdown of the marking scheme for the problem.

How can you factorize the expression to show that it is always even?

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What are the key points to remember when working with negative signs in algebraic expressions?

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