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

The video tutorial discusses common mistakes made by students when solving equations. Steve's mistake involves incorrect expansion of brackets, while Liz's error is not considering both positive and negative solutions when taking the square root. The instructor advises reworking problems independently to better identify errors.

What is the significance of considering both positive and negative solutions when taking the square root?

Why is it easier to write down the sum and work it through rather than finding a friend's mistake directly?