All Answers 359346 Answers

Hang on a tick - you seem to have an extra minus sign in the working:/

oh sorry you explained that.    It is the black minus sign that I'd like to see gone.  

The minus sign belongs to whatever term is behind it, in this case 8xy, so it is best if they are all green :)

yes thank you :) Now I really feel like part of the forum :)

√√√√√∞∝∝¾¾©®••………″¶⌊⌋⌈⌈ΑΒºªºªÊ∀¹²³¿¡¦°±÷⁄∩»«&£€

Our LaTex is only displaying some of the time.

Maybe it will display better if you start a new thread :/

That is good MG, what about the others?

Good question Zac,   

If you look in the "Insert" drop down list, the second last one is "special characters"

The   √    is in t he 3rd row some of the indices are in there as well.    

I was expecting to find pi in there but I cannot see it.    

Now go to the fromat dropdown list.  There are all sorts of formating things in there including superscripts (powers) and subscripts.  If I was not using LaTex that is what I would use for powers.

If I wanted pi I would open up the [Math Formula] box and type in pi and hit Ok:)

Does that cover it ?

I see MG has given you LaTex solutions.  I have given you non-LaTex solutions   :)

oh, in latex pi is just \pi

The circumference of a circle is pi*D or 2*pi*r

So 2*pi*10 = 20pi = 62.83 cm (2 d.c.p.)

Using Maths Formula and Calculations it is seen as sqrt(number)

E.g.

$${\sqrt{{\mathtt{10}}}}$$        sqrt(10)

In Latex it is shown as this: \sqrt{number} (The { } are really important as it lengthens the lines for longer numbers)

This is when using ( ) instead of { }

$$\sqrt(1000000000)$$                     \sqrt(1000000000)

 This is the right way.

$$\sqrt{1000000000}$$                              \sqrt{1000000000}

Powers on Formulas and Calculations are showed as (Number)^(to the power of)

$${{\mathtt{10}}}^{{\mathtt{10}}}$$                   10^10

Latex is slightly different, it uses { } on the power of so number

Using { }

$$10^{10}$$            10^{10}

As for Pi I'm not sure for the exact digits as i don't use it but you can just type 3.14 (i think)

Usually it is just a bracket.  It can also be uesd for definite integrals.  (That is calculus)

Thanks 

Well, it would be better if you made an account.

You'd be more recognisable and it's free no Email needed/optional just username and password.

(Rosala can I join the team? )

If 16 spectators can sit on 1 bench, then 16*124 spectators can sit on 124 benches (16 for each bench).

That is a really good answer Zac   

Guys our points are back!!!!

Wait, was this the system update?

(Points update)

or was it just to get out points back?

Are anons allowed here?

Thanks you are right about the brackets. I would have used latex (I did for my first example) but it would have been around 10 lines long and I was feeling lazy.

I have a question though . . .

How do people type √ (I copied that)? Also I see pi and powers used regularly but I don't understand how they do it . . . is it a keyboard thing? 

This looks intresting.

Thanks for the tip.

I will try answer it, but I haven't done Simplifying in some time now- I'll give it all I've got (lol this is probably so easy for you, it is for me, but I can't remember much, since for the past couple of month 2-3 we've been doing catching up on  fraction, percentages and decimals).

$$\\3x-2x^2-8xy+3yx-7=\\\\
Firstly,\;to\;point\;out\;3yx\;and\;8xy\;are\;the\;same\;\\
So\;I'll\;do\;xy\;as\;followed\;in\;the\;alphabet\\\\
Like\;Terms\;are\;highlighted\\\\
3x\textcolor[rgb]{1,0,0}{-2x^2}-\textcolor[rgb]{0,1,0}{-8xy}\textcolor[rgb]{0,1,0}{+3xy}\textcolor[rgb]{0,0,1}{-7}\\\\
The\;only\;like\;terms\;are\;8xy\;and\;3xy\\\\
-8xy\;+\;(+3xy)\;=-5xy\\\\
Now\;it\;is\;3x-2x^2-5xy-7\\\\$$

\\3x-2x^2-8xy+3yx-7=\\\\
Firstly,\;to\;point\;out\;3yx\;and\;8xy\;are\;the\;same\;\\
So\;I'll\;do\;xy\;as\;followed\;in\;the\;alphabet\\\\
Like\;Terms\;are\;highlighted\\\\
3x\textcolor[rgb]{1,0,0}{-2x^2}-\textcolor[rgb]{0,1,0}{-8xy}\textcolor[rgb]{0,1,0}{+3xy}\textcolor[rgb]{0,0,1}{-7}\\\\
The\;only\;like\;terms\;are\;8xy\;and\;3xy\\\\
-8xy\;+\;(+3xy)\;=-5xy\\\\
Now\;it\;is\;3x-2x^2-5xy-7\\\\

I think that's the final simplified form, but it was only one step (only like term).

EDIT: (Accidental extra minus sign in coloured equation)

Try these

I don't understand what the question is  

Well I'm back up to 561 :)

You need to show some working ProxyGOd.

Otherwise how can the asker learn anything AND how can a moderator easily check your answer?

4-2=2

therefore Lisa had two apples remaining

I would think that when you write it by hand it is automatically written as a fraction.

So it is clear what is on the bottom and what is on the top.

When you do a keyboard entry like you did that visual clarity has gone and you have to spell out exactly what you mean with brackets.

This is your one

  = √5+√6/ (√5)^2 - (√6)^2  =  $${\sqrt{{\mathtt{5}}}}{\mathtt{\,\small\textbf+\,}}{\frac{{\sqrt{{\mathtt{6}}}}}{{{\sqrt{{\mathtt{5}}}}}^{\,{\mathtt{2}}}}}{\mathtt{\,-\,}}{{\sqrt{{\mathtt{6}}}}}^{\,{\mathtt{2}}}$$

Now I am going to do the other one with latex because I can make it look EXACTLY like it should look when  you write it by hand.  (I am not expecting you to care about the LaTex)

This is what it should be

= (√5+√6)/( (√5)^2 - (√6)^2)      =       $$\frac{\sqrt5+\sqrt6}{\sqrt5^2-\sqrt6^2}$$

See, if you want all that first stuff on the top AND all that second lot of stuff on the bottom

THEN you need to show this with the brackets!

REMEMBER:     PEDMAS    

If there are no brackets then you MUST do the division BEFORE you do the addition or the subtraction.  

That is why you need the brackets.    

Yes Zac and Rosala, that is the only sensible attitude to take. :)

Any other attitude would be destructive to you. :/

but melody.....when i write it in my copy...its correct...my every teacher says it we do it like this only...we write the root nin bracket and square outside and cut them!idk whats the problem!