http://img11.imageshack.us/img11/6299/formd.jpgi got this far but now this is wrong answer any help would be great (Bow)

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- November 6th 2009, 07:59 PMrealisticquadratic formula problem
http://img11.imageshack.us/img11/6299/formd.jpgi got this far but now this is wrong answer any help would be great (Bow)

- November 6th 2009, 08:07 PMDebsta
Your mistake is in your fourth line. Should be -2 +/- 2 sqt(7) on top.

- November 6th 2009, 08:13 PMrealistic

is this what you mean

http://img18.imageshack.us/img18/214/form2f.jpg - November 6th 2009, 08:15 PMDebsta
Yep!

- November 6th 2009, 08:17 PMBacteriusReply
Then you can factorize and simplify.

- November 6th 2009, 08:19 PMDebsta
1

- November 6th 2009, 08:21 PMBacteriusReply
2

- November 6th 2009, 08:24 PMDebsta
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. - November 6th 2009, 08:24 PMrealistic
- November 6th 2009, 08:26 PMrealistic
- November 6th 2009, 08:27 PMDebsta
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.

- November 6th 2009, 08:28 PMBacteriusReply
7

- November 6th 2009, 08:32 PMrealistic
thats the answer but i cant see how cancelling out gets that (Thinking)http://img41.imageshack.us/img41/679/form3.jpg

where did the positive 2 go? - November 6th 2009, 08:33 PMrealistic
- November 6th 2009, 08:33 PMDebsta
Thanks, Realistic. I successfully deleted my earlier comment.

Wasn't sarcasm before - a serious question :)

BTW your final answer is [1 +/- sqrt(7)]/2.