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#1 2009-11-02 12:24:24

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,529

Squares and Square Roots

I decided to go from one to two pages on Squares and Square Roots:

The Original (simple): Squares and Square Roots

The New One (more advanced): Squares and Square Roots in Algebra

Does it cover it well?


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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#2 2009-11-03 01:53:29

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,675

Re: Squares and Square Roots

MathsisFun;

MathsisFun wrote:

Does it cover it well?

Yes.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#3 2009-11-03 02:37:32

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: Squares and Square Roots

Good pages!
The one change I'd make is to add a bit more explanation to when you say √2 * √2 = 2.


Why did the vector cross the road?
It wanted to be normal.

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#4 2009-11-03 08:16:00

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,529

Re: Squares and Square Roots

Thanks, will do smile


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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#5 2009-11-06 19:22:15

Anakin
Member
Registered: 2009-10-04
Posts: 145

Re: Squares and Square Roots

mathsyperson wrote:

Good pages!
The one change I'd make is to add a bit more explanation to when you say √2 * √2 = 2.

√2 * √2 = √(2*2) = √4 = 2

About that.. ^, if you really want to, you can also state that the √a * √b = √ab is not always true.

For instance, - 1 = i^2 = i * i = √-1 * √-1 = √(-1*-1) = √1 = 1

That is untrue, so if you are really bored enough, you can add that and explain why.'

smile

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