GCSE Maths - Surd Rules and Simplifying Expressions Containing Surds (Part 2/3) #41 

If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

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Just a small tip, the (root 5 + 2)^2 could be expanded more easily using the formula (a+b)^2 = a^2 + 2ab + b^2

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Sir i have a question! In the first bunch of that is √125-2√45 one , in simplifying √125 why can't we take √100×√25 ?

when you find 2 factors of a surd, does one of the factors have to be a sqaure number?

how did you simplify 5 root 5 - 6 root 5 + 9 + 4 root 5 ?

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6:14 how did he get 3 root 5 plus 9

how you got 4root3 from root48 is what’s confusing me

Brother in root 5 plus 2 whole square can we use a plus b whole square formulae

commenting for the algorithm

Did anyone get 3+7-/12

But wouldn’t the 2/5 and 2/5 cancel eachother out in the (/5 + 2) power 2 one

6:00

In that last example, where he simplified the square root of 48 as 4√3 why was it then not broken down again to read 2√3 (as the square root of 4 is 2). I’m confused..

i’m so dislexic i got confused on 5-6 being 1 or -1 i googled it

Best video, just a question. In the last example why is 2 root 75 simplified as 10 root 3? I got 2 root 25 x 3 which totaled 7 root 3 due to root 25 being 5? I'm lost

+

How is 5✓2 - 6 ✓ 2 = 3✓2?

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Hey Amadeus . quick question at 6:16 why did you simplify 6√ 5 to 3√ 5

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Safe

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