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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,608

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,201

MathsisFun;

MathsisFun wrote:

Does it cover it well?

Yes.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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

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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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,608

Thanks, will do

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

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

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.'

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