# Why does sqrtAB over B become sqrt AB

• Jun 27th 2012, 07:16 AM
TeslaCoil
Why does sqrtAB over B become sqrt AB
How do I make a post solved please

I know from using practical values this does happen but I don't understand were the extra B is cancelled out
I will try again with LaTex

THIS IS NOT CORRECT perhaps some could show me what is wrong
$frac\{\sqrt{AB}{B}$

I still can not work LaTex out ! . I have been trying for 5 hours !
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This was muy original question
Here is a paint jobbyAttachment 24173
• Jun 27th 2012, 07:26 AM
Plato
Re: Why does sqrtAB over B become sqrt AB
Here is the correct LaTeX.
[TEX]\frac{\sqrt{AB}}{B} [/TEX] gives $\frac{\sqrt{AB}}{B}$.

$\frac{\sqrt{AB}}{B}=\sqrt{\frac{AB}{B^2}}=\sqrt{ \frac{A}{B}}$

BTW: The symbol $\boxed{\Sigma}$ on the tool bar gives the TeX wraps.
• Jun 27th 2012, 08:23 AM
Soroban
Re: Why does sqrtAB over B become sqrt AB
Hello, TeslaCoil!

Quote:

$\text{Why does }\:\frac{\sqrt{AB}}{B} \:=\:\sqrt{\frac{A}{B}}\;?$

$\frac{\sqrt{AB}}{B} \;=\;\frac{\sqrt{A}\cdot\sqrt{B}}{\sqrt{B}\cdot \sqrt{B}} \;=\; \frac{\sqrt{A}}{\sqrt{B}} \;=\;\sqrt{\frac{A}{B}}$
• Jun 27th 2012, 08:33 AM
richard1234
Re: Why does sqrtAB over B become sqrt AB
Don't forget to insert \ before any command (\frac, \int, \epsilon, \hspace).

For example, \frac{\sqrt{AB}}{B} gives $\frac{\sqrt{AB}}{B}$ and \sqrt{\frac{A}{B}} gives $\sqrt{\frac{A}{B}}$
• Jun 27th 2012, 08:33 AM
TeslaCoil
Re: Why does sqrtAB over B become sqrt AB
Thanks that was a nice answer
• Jun 27th 2012, 08:36 AM
TeslaCoil
Re: Why does sqrtAB over B become sqrt AB