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<div>Originally Posted by <strong>Niko-Time</strong></div>

<div style="font-style:italic;">Well, my maths teacher has given me a sheet on surds for "revision" (even though she never taught us it in the first place) and I don't have a clue how to do it. She gave it to us today and its for tomorrow (current time is 22:48)<br><br>

The sheet is on <a href="http://www.harrycarlton.co.uk/subjects/maths/gcsehomeworrk/Higher1t30.pdf" target="_blank">http://www.harrycarlton.co.uk/subjec...Higher1t30.pdf</a> the password is "eastleake" and it is page 4 for surds.<br><br>

Can anybody help/point in right direction/do something to help me out please?<br>

Its something to do with leaving it in the square root form or something...<br><br>

Thanks guys</div>

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Alright, you'll need a calculator. I assume you have one.<br><br>

It's simple, just enter the problem in the calculator and it pretty much does all the work. So you can get the idea of how it works, I'll do one for you.<br><br><img alt="" src="http://img.photobucket.com/albums/v335/iskate46/untitled-2.jpg" style="border:0px solid;"> is equal to "the square root of 500 minus 3 times the square root of five".<br><br>

When its a number and then the square root sign, and then another number, that means to find the square root of the number on the right and then multiply that times then number on the left. It's simple, it's your "PEMDAS" rule, or order of operations. (Parentheses, exponents, mulitply, divided, add, subtract)<br><br>

Okay, so once you have solved that it's just the square root of 500 minus that other thing you solved. (3 times the square root of 5)<br><br>

If you need any other help, I'll be here for a while lol.