Melody

$$\sqrt[3]{(9+4 \sqrt 5}+\sqrt[3]{(9-4 \sqrt 5} = 3$$

Umm I do not know - I'll have to think about this one!

Thanks Chris 

I don't know if all those anon posts are from the same person.  

It would be easier if your joined up and then I would know :)

Anyway I'll talk about it a little more

If there are no brackets then you DO NOT put any in.  The answer will be negative.

$$\\-6^2=-36\\
-x^2<0$$

The negative sign is ONLY squared if the brackets are there in the original question.

$$(-7)^2=49

(-x)^2>0 \qquad $always$$$

Does that help?

Great answer Chris :)

Thanks Chris,

I can't take too much credit - It was a straight copy off the net :)

That is the number.  It is called a googloplex.

But if you want the numbers with a 1 and lots of zeros, the answer is no. There are more zeros than your brain or mine can make any sense of.   

Do you want to know the weights of these things?

Are they made of lead or clay or styrophom. It makes a difference  

There is no formula - you just have to understand the question.  

1/2pi squareroot(pi*0.0004^2/1000*1.5*(2*10^-13)

enter like this if you want what is below.  

1/2*pi*sqrt((pi*0.0004^2)/(1000*1.5*2*10^-13))

$$\frac{ \pi }{2} \sqrt{\frac{\pi*0.0004^2}{1000*1.5*2*10^{-13}}}$$

You can do this on the site calc on  the home page.  

These are good questions - welcome to web2.0calc forum :)

Any real number divided by itself = 1       except for 0       0/0  is undefined

So w/w = 1 so long as w is not equal to 0   

NOW

$$\\(-3)^2=-3*-3=9\\
but\\
-3^2=-1*3^2=-1=9=-9\\\\
$I know this is confusing but think about this question.$\\
20-3^2=20-9=11\\
$See how the - sign did not get squared ?$\\
$If I can help more or explain more let me know. $$$