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Article #42Re: Need Urgent Help
From: Philip Stewart
Date: Sat, 10 Apr 1999 00:00
Date: Sat, 10 Apr 1999 00:00
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1670 bytes
Siobhan Michaels <micfam@globalnet.co.uk> wrote in article <7eilld$ng8$1@newnews.global.net.uk>... > Also, i can't grasp the topic of surds and could anyone help me with that?? A surd is an irrational number written in a precise form e.g. sqr(2) instead 1.41421 ... 25 * pi instead of 78.53982 ... etc. Surds are more precise and are more aesthetically pleasing. One situation where you might come across surds is when using the quadratic equation formula e.g. x^2 + x - 1 = 0 a = 1, b = 1, c = 1 x = (-b +or- sqr(b^2 - 4ac)) / 2a x = (-1 +or- sqr(1 + 4)) / 2 Roots in surd form: x = (-1 + sqr(5)) / 2 and x = (-1 - sqr(5)) / 2 Of course it looks much better on paper. -- From Phil Weird Stuff http://www.lichp.freeserve.co.uk/weird/stuff.html
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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: 10d67e,ab0420a1ca965d5f X-Google-Attributes: gid10d67e,public X-Google-Thread: f5482,ab0420a1ca965d5f X-Google-Attributes: gidf5482,public From: "Philip Stewart" <phil_stewart@yahoo.com> Subject: Re: Need Urgent Help Date: 1999/04/10 Message-ID: <01be837f$1d839340$592b883e@dad-s-computer> X-Deja-AN: 464863703 References: <7eilld$ng8$1@newnews.global.net.uk> X-Complaints-To: abuse@theplanet.net X-Trace: news6.svr.pol.co.uk 923770324 6006 62.136.17.1 (10 Apr 1999 18:52:04 GMT) Organization: Customer of Planet Online NNTP-Posting-Date: 10 Apr 1999 18:52:04 GMT Newsgroups: uk.education.maths,aus.mathematics,alt.math.recreational,alt.algebra.help