Melody

921 Questions
34315 Answers

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Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
read more ..

Melody Apr 2, 2022

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Reporting problems.

There are a number of people having problems at the moment.
If you lodge an error can you please give all relevant information that you can think of.
Where you are in the world - the city or the country - is often very important information. read more ..

Melody Mar 16, 2022

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How to make an empty rectangle in Latex

I just worked out how to make an empty box of various horizonal size easily in LaTex.
This is not a recommended method, but other methods that I have tried here have not worked.
This coding is really simple. Just put letters inside read more ..

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Melody Mar 15, 2022

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HAPPY ANNIVERSARY CHRIS! (CPhill)

I just realized that you became a member here exactly 8 years ago today!

It has been great to have you here all that time

off-topic

Melody Mar 13, 2022

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WELCOME BACK CPHILL !

Melody Feb 11, 2022

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Very interesting question. No high level maths required.

This question was posted a couple of days ago.
https://web2.0calc.com/questions/geometry_73561

I think it is really interesting. It looks much more difficult than it really needs to be. read more ..

Melody Feb 1, 2022

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Members have a better experience. Their questions get more attention.

Almost everyone is posting as a guest.
If you post as a member your questions will have a far greater chance of a timely and helpful response.
If you are a genuine learner and interact with us, you will become known and answerers will do read more ..

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Melody Jan 9, 2022

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HAPPY BIRTHDAY CHRIS!

Melody Dec 20, 2021

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Some guidelines for question askers.

Please note:
1) Ask only one question per post.
2) When asking a question talk about what you have tried for yourself. Then people will take you more seriously and will be more able and willing to help.
3) If you get an answer read more ..

off-topic

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Melody Nov 4, 2021

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Remeniscing - a little historical humour.

I just found this old post that some of you, who have been around for a while, might find amusing.

https://web2.0calc.com/questions/look-at-the-new-leader-board

off-topic

Melody Oct 29, 2021

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+1

MelodyMar 23, 2014

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MelodyMar 23, 2014

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Quote:
Meds wrote:What's x3+x2

[original question]

Peter:
X+3+x+2 = x7

Hi Peter,
I like that you had a go at meds question.
but if a number and a letter are together without anything inbetween then there is an invisable x sign not a plus.
it is usual for the number to go first so.

3x is 3 multiplied by x NOT 3+x

MelodyMar 23, 2014

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Thanks Dms,

please note Geof that the fraction line has to be a forward slash (you used a back slash)

If you need more help or clarification don't hesitate to ask.

MelodyMar 23, 2014

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Meds:
What's x3+x2

do you meant
x ³+2 ² ? (Sometimes written as x^3 + x^2 )

You can't simplify this, they are unlike terms because they have different powers so you can't add them together.
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However you can factorise if you want to.
Both terms can be divided by x ²
so it equals
x ²(x+1)

MelodyMar 23, 2014

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Great demonstraton Reinout

What a great 'proof'. I like it.

I always suspected that 1=2

MelodyMar 23, 2014

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hi Stu,
I am really only offering help on the forum. I am very happy to give you a great deal of my time.
If you can afford it you are best to look for private 1 to 1 tuition. I know that you already know this.
I advertise private tuition on gumtree. This would be a good place for you to start your search. You can place your own ad for 'tuition required' if you like. It is free.
Your Skype idea sounds interesting. I have never used Skype. My technical knowledge has gaping holes in it.
Melody.

MelodyMar 23, 2014

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I'm with Rom,
By convention, the square root of any number > 0 is positive.
Your question sqrt ([-1 ²])= sqrt (1) = +1

If the square root is in the question the answer is poitive. If you introduce the square root as a part of your working then the answer can be + or -

eg
If the question is y=sqrt(16)
then the answer is y=4

but
if the question is y ²=16
then you have to introduce the sqrt so the answer is y=+ or - sqrt(16) = +4 or -4

MelodyMar 23, 2014