Question

Solve the Equation!!!!!!! PLEASE HELP!
3x^2=x-9

Answer 1

There are three methods to deal with quadratic equations (equation in the second degree) like this:
(a) Cross method
(b) Complete the square
(c) Quadratic formula

Answer 2

Please choose one.

Answer 3

...among others.

Answer 4

i guess whichever is easier

Answer 5

Bad idea.

In school - Whichever will teach you the most.
In general - Whichever works the best and can be explained.
In programming - Which is fastest or most appropriate or more effective at eliminating round-off error.

Answer 6

uhh can i just get some help?

Answer 7

i need to go to bed sometime lol

Answer 8

http://www.slideshare.net/leblance/chapter-4-extra-practice-answers Answer sheet..number 79

Answer 9

You've received quite a lot. What method do you choose? Show us!

Answer 10

ive always thought u factored

Answer 11

Can you factor it? Show that, please.

Answer 12

i dont know if i can, all i have so far is probably wrong. I need someone that knows what their doing

Answer 13

Don't divide all by -3 because that'll make the middle coefficient non-integer

Answer 14

well then can u show me the full problem step by step so i can understand???

Answer 15

Wait, this equation doesn't have real roots

Answer 16

yup

Answer 17

look at answer key

Answer 18

http://www.slideshare.net/leblance/chapter-4-extra-practice-answers

Answer 19

Are you learning complex number?

Answer 20

Oh that's why

Answer 21

yup

Answer 22

So quadratic formula is the way

Answer 23

how! show work ive already tried everything under the sun!

Answer 24

Quadratic formula:
For ANY quadratic equation \(\Large ax^2+bx+c=0\):
\[\Large x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]

Answer 25

3x^2=x-9
3x^2-x+9=0
x=(1±sqrt(1-4*3*9))/6

Answer 26

Simplify everything

Answer 27

----> http://prntscr.com/3b20m4

Answer 28

@SOS101 i know thats the answer but, how do u do it? Does that website show work?

Answer 29

No it doesn't ,Let me try the other website

Answer 30

ok thanks @SOS101

Answer 31

Would you guys please stop depending on computer and learn the knowledge

Answer 32

Which part of my solution did you not understand

Answer 33

i got down to x=1 +/- sq rt -108 over 6.......and without the internet i wouldnt know how to do half the stuf iknow how to do. so..

Answer 34

Dude stop being so butt hurt , we live in a mobile/technology generation where if we some how need a little extra help then we can turn to technology , there's nothing wrong with receiving help

Answer 35

There's nothing wrong with learning things from the Internet, but absolutely with finding answers from the internet

Answer 36

without any explanation at all

Answer 37

What can you learn from your website

Answer 38

Nope that's still only your opinion

Answer 39

Actually I was trying to find the answer with the explanation so..

Answer 40

if u read above, i said i wanted an explanation with the answer to TEACH me so..

Answer 41

@ShelbyRenaebb: Anything you still don't understand?

Answer 42

btw i got the answer, using a different way. can you help with Number 37 & 41??? i really need to get to bed im so tired its 4 am D:

Answer 43

http://www.slideshare.net/leblance/chapter-4-extra-practice-answers

Answer 44

It's still the quadratic formula

Answer 45

For 41 it's not the quadratic formula

Answer 46

can u teach me how to graph them?? i dont know how and want to learn

Answer 47

\[\begin{array}{rcl}
x^2+4x&=&0\\
x(x+4)&=&0\\
x=0&or&x+4=0\\
x=0&or&x=-4
\end{array}\]

Answer 48

my test is in 2 days

Answer 49

Basically you can just find y when x=-2, x=-1, x=0, x=1, and x=2 then join the dots together if you wanna graph 'em

Answer 50

how do u find the answer.. (#37)? its supposed to be 0.41 and -2.41

Answer 51

For 37 it's just the quadratic equation

Answer 52

kk thanks