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#101 2013-11-15 14:34:56

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,376

Re: Change your subject.

I repeated it because of this:

But when 9 is in a square root sign it gives two answers i.e -3 and 3.

I wanted him to be sure that the answer is only 3. 1 answer not 2.


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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#102 2013-11-17 20:26:59

EbenezerSon
Member
Registered: 2013-07-04
Posts: 456

Re: Change your subject.

Hi, bobym.

Look the link you provided at page 4 concerning the square roots signs.
It says so:

When two numbers are multiplied within a square root, you can split it into a multiplication of two square roots.
But only when X and Y are both greater than or equal to 0.
My question is:

Which figure is equal to zero before  the splitting will be possible?



wave

Last edited by EbenezerSon (2013-11-17 20:35:26)


I know only one thing - that is that I know nothing

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#103 2013-11-17 21:41:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,376

Re: Change your subject.

Hi;

I do not see the figure.


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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