i got this far but now this is wrong answer any help would be great
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Your mistake is in your fourth line. Should be -2 +/- 2 sqt(7) on top.
Originally Posted by Debsta Your mistake is in your fourth line. Should be -2 +/- 2 sqt(7) on top.
is this what you mean
Then you can factorize and simplify.
Last edited by Debsta; Nov 6th 2009 at 09:30 PM.
Last edited by Bacterius; Nov 6th 2009 at 09:43 PM.
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.
Originally Posted by Debsta What the? 7^2 = 49 not 28 ???? 2^2-4x(-2)x3 =28
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) |
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.
thats the answer but i cant see how cancelling out gets that
where did the positive 2 go?
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
Thanks, Realistic. I successfully deleted my earlier comment.
Wasn't sarcasm before - a serious question
BTW your final answer is [1 +/- sqrt(7)]/2.
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