Year 12/AS Pure Chapter 1.4 (Indices and Surds)

This video is the final on the topic of Indices and Surds. This video focuses on how we can use the method of the difference of two squares to remove any surd in the denominator of a fraction. This process is called "Rationalising the denominator" and is the focus of this video. This lesson is meant as preparation for Exercise 1F, page 15 of the Pearson Edexcel Pure Mathematics Year 1/AS Textbook: bit.ly/PuretextbookYear1 Introduction: 00:00 Solution to Warm-Up Q1: 0:45 Solution to Warm-Up Q2: 3:50 Solution to Warm-Up Q3: 5:05 Solution to Warm-Up Q4: 7:09 RATIONALISING THE DENOMINATOR - Introduction: 11:36 Worked Example 1 part a): 14:02 Worked Example 1 part b): 14:25 Worked Example 1 part c): 15:25 Worked Example 1 part D): 16:59 Worked Example 2: 19:31 Suggested Exercises: 25:27