Jump to content
Acne.org
Search In
Find results that contain...
Find results in...

Recommended Posts

So...

I know how hard it can be having acne and scarring....

And being in an education system at the same time makes it worse....

But if you ever have any math problems, whether it may or may not be related to your acne, please ask me for help. eusa_dance.gif

I wish I could help anyone having psychological problems due to acne.

Thanks.

Share this post


Link to post
Share on other sites
Guest Marino

Mummy Leese + Daddy Leese= Madam Leese [AKA; Adam]

user posted image

Now think about that... jack eusa_hand.gif

Share this post


Link to post
Share on other sites
Guest mishmosh
In highschool, I never got past Algebra I. I am officially a math retard!

everyone got their strengths and weaknesses. i wasnt too good in english classes in america.

Share this post


Link to post
Share on other sites

It's easy...

For a quadratic equation ax^2 + bx + c = 0 (^2 = to the power 2 or squared), you plug in the values to:

x = -b + OR - the square root of b^2 - 4ac all over 2a...

+ OR - because there are 2 solutions to every quadratic equations..... or conjugate imaginary solutions.... or equal solutions if b^2 - 4ac = 0

An example....

Solve x^2 + 4x = -9

First make it the form ax^2 + bx + c = 0

x^2 + 4x + 9 = 0

a = 1, b = 4, c = 9, solve...

x = -4 + or - square root of (16 - 36) all over 2

x = -4 + or - square root of (-20) all over 2

Now, we have the root of -20, since it's minus we'll take out i or j (depending on your math course; if you're in a non-engineering discipline you'd use i instead of j)

x = -4 + or - i sqrt(20) all over 2 (sqrt short for square root of

Simplify the root....

x = -4 + or - 2i sqrt(5) all over 2

Simplify the fraction...

x = -2 + or - i sqrt(5)

So now we have....

x = -2 + i sqrt(5)

or

x = -2 - i sqrt(5)

(Where i means i multiplied by square root of 5...)

Why did we bring out the i? Because you can't have a negative square root, and i is the imaginary number standing for the square root of -1.....

I don't want to get into complex numbers right now, so blahblah.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Personalized Advice Quiz - All of Acne.org in just a few minutes

×