CONSTRUCTIONS of a+b,ab,a/b,a-b, a^(1/2)

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The discussion focuses on constructing the operations a+b, ab, a/b, a-b, and a^(1/2) using a ruler and compass, specifically for positive numbers a and b. The initiator seeks guidance on starting the construction process and considers treating points a and b as vectors. There is an acknowledgment that understanding constructible numbers is essential, but the poster feels uncertain about the initial steps. The conversation indicates a need for clarity on how to approach these mathematical constructions effectively. The thread concludes with the poster's intention to move the discussion to a more appropriate section.
calvino
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i'm suppose to show how to construct each of the following:

a+b,ab,a/b,a-b, a^(1/2) ... a,b >0

This has to do with constructible numbers using the ruler and compass.

So i know that a number is constructible if it the distance (or negative distance) between two constructible points, but I suppose I don't really need such a fact. hmm... SO how do i start this? Can I just look at points a, and b as vectors. I'm sure if I get help with a+b, I can start working on the rest. thanks..
 
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sorry..i posted in the wrong section. I will repost in another...CLOSED
 

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