Article View: uk.education.maths
Article #32Re: Need Urgent Help
From: Matthew Daly
Date: Fri, 09 Apr 1999 00:00
Date: Fri, 09 Apr 1999 00:00
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2253 bytes
I'll never forget the time that Jeremy Boden <jeremy@jboden.demon.co.uk> said: >In article <370CE0C2.6CBA40D3@flash.net>, Matt McLelland ><mattpi@flash.net> writes >>Siobhan Michaels wrote: >... >>> Also, i can't grasp the topic of surds and could anyone help me with that?? >>I don't know what a surd is. > >A root as in square root, cube root etc. You must be more specific. Even though that is what it means, the only context in which I've ever heard it used in conversation was specifically finding the square root of irrational binomial numbers like 22 + 12u, where u is the square root of 2 or complex numbers. As someone pointed out, there is always a solution (if the two numbers are rational) and you can find it by assuming that the number is of the form A+Bu where A and B are rational numbers, squaring that figure, and then creating a system of equations by equating the rational parts and the parts that are the rational multiple of u. -Matthew --- Matthew Daly mwdaly@pobox.com http://www.frontiernet.net/~mwdaly/ Though he is a person to whom things do not happen, perhaps they may when he is on the other side. - E. Gorey
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f458d,ab0420a1ca965d5f X-Google-Attributes: gidf458d,public X-Google-Thread: 1130d6,ab0420a1ca965d5f X-Google-Attributes: gid1130d6,public X-Google-Thread: f5482,ab0420a1ca965d5f X-Google-Attributes: gidf5482,public X-Google-Thread: 10d67e,ab0420a1ca965d5f X-Google-Attributes: gid10d67e,public From: mwdaly@pobox.com (Matthew Daly) Subject: Re: Need Urgent Help Date: 1999/04/09 Message-ID: <370d7027.47780557@news.frontiernet.net> X-Deja-AN: 464290730 Content-Transfer-Encoding: 7bit References: <7eilld$ng8$1@newnews.global.net.uk> <370CE0C2.6CBA40D3@flash.net> <j3rtBHARESD3Ewaw@jboden.demon.co.uk> Content-Type: text/plain; charset=us-ascii X-Complaints-To: abuse@frontiernet.net X-Trace: node17.cwnet.frontiernet.net 923628035 11318 209.130.219.177 (9 Apr 1999 03:20:35 GMT) Organization: Frontier GlobalCenter Inc. Mime-Version: 1.0 Reply-To: mwdaly@pobox.com NNTP-Posting-Date: 9 Apr 1999 03:20:35 GMT Newsgroups: uk.education.maths,aus.mathematics,alt.math.recreational,alt.algebra.help