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## #1 Re: Help Me ! » Quadratic Help » 2006-05-09 21:07:36

why have you started the third topic with the same question??
keep all the questions in one topic!!!!
Remember that you also know the distance between roots (this is what you wrote in another post

## #2 Re: Help Me ! » trigonometry » 2006-05-09 20:42:06

maybe this will help

## #3 Re: Help Me ! » Urgent Parabola Help!~! » 2006-05-09 19:11:51

sorry, i dont get it :-(

maybe i'm just to tired :-)

## #4 Re: Help Me ! » Urgent Parabola Help!~! » 2006-05-09 18:55:18

when ax^2 + 0x + 185 what?

## #5 Help Me ! » propositional logic » 2006-05-09 18:17:30

kempos
Replies: 1

hi guys

Do you have any idea where I could find some worksheets (printouts) on propositional calculus - high school?

## #6 Re: Help Me ! » mathematical logic websites » 2006-03-10 19:03:57

thanks gamesh.
i'm also looking for some websites with basic and intermidiate problems on mathematical
logic

## #7 Help Me ! » mathematical logic websites » 2006-03-10 18:41:31

kempos
Replies: 3

I am looking for some good websites on mathematical logic (high school level).

## #8 Re: Help Me ! » I don't know what ≡ means. » 2006-02-20 04:30:06

used for identities (trigonometry) to indicate that something is always true - in trigonometry true for any angle for example.

## #9 Re: Help Me ! » need help finding the derivative » 2006-02-20 04:26:40

[f(x)/g(x)]' = (f'(x)*g(x) - f(x)*g'(x))/[g(x)]^2 = (0*x - 1*1)/x^2 = -1/x^2

3. (3x^2-5)/x^2

## #11 Re: Help Me ! » Rational Expressions -- Homework :( » 2006-02-20 04:16:59

1. Denominator: (x+4)(x+9)

## #12 Re: Help Me ! » calculus books » 2006-02-14 16:58:19

high school (last three years of HS)

also looking for some good books on trigonometry

## #13 Help Me ! » calculus books » 2006-02-14 16:47:05

kempos
Replies: 3

hi guys

could you please recommend some books for calculus and geometry

thanks

## #14 Re: Help Me ! » Perpendicular Lines » 2006-02-13 20:19:37

y = (5 - x)/3

equation of a straight line: y = ax + b where a is a gradient.

## #15 Re: Help Me ! » Basic algebra question.... » 2006-02-08 03:01:28

btw, you can solve it for p. it is a quadratic equation in terms of p

## #16 Re: Help Me ! » Basic algebra question.... » 2006-02-08 03:00:26

terms of algebraic expression:
here we have three terms:
10p2
-2p
-1

(1/ln2)*2^x +C
in other words:
(2^x)/lna

## #18 Re: Help Me ! » who owns da fish? » 2006-02-08 02:20:04

i don't know what nationalities you have there but it's 4th house

## #19 Re: Help Me ! » Another Question Via Email » 2006-02-08 02:14:15

i don't think it's possible to predict when there will be a prime number. but might be wrong :-(

## #20 Re: Help Me ! » calculation » 2006-02-08 02:07:39

berthold the chances are much less than 2000000.
i'm not sure how they distribute(divide) the prizes but i'm sure that by buying all possible combination you won't win more than you spent.

## #21 Re: Help Me ! » 7% of 9% » 2006-02-08 02:04:41

to simplify means to divide denominator and denominator by the same number :-)

## #22 Re: Help Me ! » 7% of 9% » 2006-02-07 18:20:54

7% of 9% = 7/100 of 9/100 = 7/100 * 9/100 = 63/10000

## #23 Re: Help Me ! » equation number 2 » 2006-02-06 21:03:13

i don't get this step:

x^6 + 30x - 1 = 0

Let x^3 = y,  then;

y^2 + 30y - 1 = 0

why do you have 30y if y = x^3?

## #24 Re: Help Me ! » Four Equals Five » 2006-02-06 20:47:56

step 5. there you should have absolute value.

## #25 Re: Maths Is Fun - Suggestions and Comments » how to send an e-mail to a member » 2006-02-01 20:31:19

thanks guys for quick replies.