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

The video tutorial addresses two math problems involving rationalizing denominators. First, it examines Martin's incorrect solution to the problem 14 / (2 + root 3), identifying his mistake in multiplying root 3 by minus root 3. The correct approach is explained. Next, the tutorial analyzes Sean's error in rationalizing 5 over root 12, where she incorrectly simplifies root 12. The correct method is demonstrated, highlighting the importance of identifying square factors. Both sections emphasize understanding and correcting common mistakes in rationalization.

Describe the mistake Sean made when simplifying root 12.

How did Sean incorrectly express root 12 in her workings?