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

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,535

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: 86,364

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.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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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: 7,535

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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