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# (1 / (4-sqrt15) )^2 can be written not as a fraction

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Joined: 13 Aug 2005
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Location: Israel
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(1 / (4-sqrt15) )^2 can be written not as a fraction [#permalink]  30 Aug 2005, 23:29
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(1 / (4-sqrt15) )^2 can be written not as a fraction?

Thanks, Yaron
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Joined: 19 Jul 2005
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Re: PS - Algebra [#permalink]  31 Aug 2005, 00:53
yaron wrote:
Could you show how this:

(1 / (4-sqrt15) )^2

can be written not as a fraction?

Thanks, Yaron

Multiply with (4+sqrt15)/(4+sqrt15) will give you

(4+sqrt15)^2 which will not be a fraction
Re: PS - Algebra   [#permalink] 31 Aug 2005, 00:53
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