# Math Help - quadratic formula problem

i got this far but now this is wrong answer any help would be great

2. Your mistake is in your fourth line. Should be -2 +/- 2 sqt(7) on top.

3. Originally Posted by Debsta
Your mistake is in your fourth line. Should be -2 +/- 2 sqt(7) on top.

is this what you mean

4. Yep!

Then you can factorize $2$ and simplify.

6. 1

2

8. Hey Bacterius,
For future reference, how do you self-delete things that you wish you hadn't posted. Hasn't happened to me yet, but I'm sure it will.

9. Originally Posted by Debsta
What the? 7^2 = 49 not 28 ????
2^2-4x(-2)x3 =28

10. Originally Posted by Debsta
What the? 7^2 = 49 not 28 ????
i dont get how you get this can u please explain

and to delete a comment you select edit then delete (not sure if that was sarcasm) |

11. Yep. You're right... I was responding to Bacterius. All you have to do now is factorise out the 2 and cancel and you're done.

7

13. thats the answer but i cant see how cancelling out gets that

where did the positive 2 go?

14. Originally Posted by Bacterius
Forget this Realistic, it's my stupidity. You got it right.

Debsta, I don't know, I have some quickly-posted things I want to clear but can't find the delete command ... I'll have to look in the FAQ.

EDIT : I've seen you can't delete your threads because of various reasons. I guess the same goes for posts ... what if I really want to remove the evidence ?
dont worry i really appreciate all the help

15. Thanks, Realistic. I successfully deleted my earlier comment.
Wasn't sarcasm before - a serious question