Math Is Fun Forum

Maybe he wanted to correct something he'd done wrong 5 years ago. Something really bad.

It's kind of the other way around.

Nostalgia is you remembering stuff that happened ages ago and getting a warm fuzzy feeling about all of your happy memories.

Deja vú is you seeing something happening in exactly the same way to the way that you saw it happening before some time ago, which is unsettling because in this world of chaos and unpredictability that doesn't happen very often. Obviously, watching videos and stuff that will obviously always be the same doesn't count.

Complete the following using fractions, not decimals.

27. x² + 3x + 1

28. x² - x - 7

29. x² + 5x - 2

30. x² - 29x - 7

31. x² - 7x +9

32. x² + 13x + 17

No worries. I had the same problem!

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That's right. It's easier to just write √32 instead of 5.6568542...

As this is the Exercises forum, espeon, it's probably better if you post questions about certain topics you don't understand elsewhere, like in 'Help Me' or 'This is Cool'. These exercises are for people who want to practise solving problems which they already know how to do.

It's great that you want to know more, but please post keep this area of the forum tidy - don't let posts stray too far from the actual problems. This message isn't just aimed at you; it's really for everyone. Thanks.

You can find more out about the questions above at these links:
Squares and square roots - http://www.mathsisfun.com/square-root.html
Surds - http://www.mathsisfun.com/surds.html
Irrational numbers - http://www.mathsisfun.com/irrational-numbers.html

Hello Naresh. How's the weather in Hyderabad now?

Hello. Thanks for joining us!

Looking good, as always.

The letter menu should stay up the top even once a letter has been selected - this eases searches without always having to go back to the main page.

Also, maybe entries which are similar, have related words or opposites etc could be linked? For example, where it says, 'See [synonymous word]'. Or is this too messy?

Some of the letters seem a bit empty. Only one entry for 'I'? Indice, isosceles, infinity, integer, increase, index, irrational ...

One more thing!

I tried typing 'converging lines' and searching and it said it didn't match any documents. Am I using the correct search function?

Yeah, I knew someone would write that, because I wrote it in a maths project once.

Something like, 'And that shows that the height of the cube is x!'

This says that 'If you are sinking beyond your thighs, lie back and distribute your weight evenly over the surface. Don't lean forward or try to crawl or "swim" out unless you are in really  deep! In thicker mud and quicksand, this will only work you in further. Lying back causes you to "backfloat" so that you can slowly and carefully pull your legs free. Once the legs are out, roll over the top and onto firm ground.'

So, I think lying on your back doesn't make you unsinkable, but it might help get you out of sticky situations.

Hello. Good find!