Mathematics D:

[cucumberdude]

eek help

I have this math problem where I used Quad. formula and I'm trying to simplify but I'm stuck. And that check mark thing is my attempt at 2 root 2.

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(-6 +- 2√(2)) / (-2)
My first idea was hey, easy, just factor out -2 on top to get rid of the fraction! Then I realized that I had that pesky +-... If you don't see what I mean, try it yourself.

Any geniuses with ideas?

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[Pulchritude]

I think you can multiply the whole thing by negative two, thus getting rid of the fraction...

Or is that what you already tried?

[Nethog]

The sqaure root of -8 divided by -2 :o hard

[Nethog]

1.41421356 i

[Space Guy]

(-6 ± √2) / -2

= (-3 ± √2) / -1

= -(-3) ± (-√2)

= 3 ± √2

You don't have to worry about "divide ± by a minus" unless you're trying to do equations with more than one of them.

Nethog: It ends up as "- (root 2)" not "root (-2)"

[Travis [bob36455]]

3.1415927

[cucumberdude]

(-6 ± √2) / -2

= (-3 ± √2) / -1

= -(-3) ± (-√2)

= 3 ± √2

You don't have to worry about "divide ± by a minus" unless you're trying to do equations with more than one of them.

Nethog: It ends up as "- (root 2)" not "root (-2)"

Ha, thanks space. Got that answer a while back but thought I forgeted up :/

As I said, thanks guise :3

[Nethog]

Well im only in 7th :\

[pecon7]

I made this, it can help with random stuff. It can do the Quadratic formula if you give it the A, B, and C variables in AX² + BX + C = 0

http://scratch.mit.edu/projects/pecon7/1228303

[Mikiyikiy]

AR MATH BRAIN

HURT BAD :C

[rockslide26]

Meh.

[Raeyok]

AR MATH BRAIN

HURT BAD :C

[Space Guy]

One thing also is that if you get "-x² + ... = 0" (I assume that's where you got the -2 from) then you can multiply everything there by -1 before you put it into the formula. Gets you the same roots overall, but you have to be a bit more careful when graphing it for the direction some lines come from.