MathGroup Archive: September 2004 [00421]

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Expanding a Square Root

To: mathgroup at smc.vnet.net
Subject: [mg50813] Expanding a Square Root
From: "Jim Dars" <jim-dars at comcast.net>
Date: Wed, 22 Sep 2004 00:11:32 -0400 (EDT)
Sender: owner-wri-mathgroup at wolfram.com

Hi All,

I should point out that I use Mathematica 4.0 infrequently, thus I may be
missing the obvious.  My problem is as follows:

In the following I use the square root sign from the palette for SQRT
Expand[(44+9*SQRT(23))^2]  yields
3799 + 792*SQRT(23)

I now wish to take the square root of  3799 + 792*SQRT(23) to return to my
original expression.  However

Expand[SQRT(3799 + 792*SQRT(23))] merely yields

[SQRT(3799 + 792*SQRT(23))]

What is the proper command to make SQRT(3799 + 792*SQRT(23)) yield
44+9*SQRT(23)

Best wishes, Jim

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