# Please could someone explain surds to me?

Unit 2 mathematics. It would really help as my revision guide is hard to understand!

Posted Mon 21st May, 2012 @ 19:41 by Beth Ackers

http://getrevising.co.uk/resources/surds7 there you go, i made some notes for you :)

Answered Mon 21st May, 2012 @ 22:09 by Hummi C

Surds are irrational numbers eg √2

To add surds the number under the root has to be the same

Eg. √2 + 3√2 = 4√2. So you wouldn’t be able to a 4√2 to 3√3.

To times surds you just times the numbers under the root.

Eg. √3 x √2 = √6

or 2√2 x 5√7 = 10√14

Answered Tue 22nd May, 2012 @ 12:04 by Sophie

Are we talking about GCSE level or A level?

Answered Mon 21st May, 2012 @ 19:44 by Hummi C

GCSE!

Answered Mon 21st May, 2012 @ 20:04 by Beth Ackers

Use this website http://www.examsolutions.co.uk/maths-revision/syllabuses/GCSE/period-1/Higher/module.php#Surds

Has videos on every single mathematical topic and goes through past papers etc. Highly recommendable :)

Answered Tue 22nd May, 2012 @ 14:58 by Imogen

A set of tutorials on everything you need on surds for Unit 2 AQA higher

Answered Sat 2nd June, 2012 @ 23:39 by Mr Hegarty

Surds are basically irrational numbers like the root of 2 or pi. They are impoisible to place on a number line because we don't know exactly what they are.

So the best way to describe them rationally is in the form of roots.

Surds are square numbers which don't make a perfect square.

hope this helps :)

Answered Mon 21st May, 2012 @ 20:36 by rhona

they are unexplainable in my opinion!

all the best though

Answered Tue 22nd May, 2012 @ 10:54 by David G Hood