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# Discriminant Help Watch

1. Well I know the basics but im stuck on a problem I've had a look on the mark scheme but that just confused me like twice as much
I know you use B^2-4ac=0
No clue what to do after that :s
Thx

xD forgot to put in question
Theres the link (not sure how to put it as a pic)
2. Well, you know that so that just means which can be solved quadratically, (you know p > 0 remember) part (b) should follow easily then.
3. (Original post by Scott3142)
Well, you know that so that just means which can be solved quadratically, (you know p > 0 remember) part (b) should follow easily then.
but theres a X next to the 2p so when i tried that i included the Xs why would you take the X out :s
4. It's simply because the quadratic equation is given as the solution to (ie, it's found by rearranging to get x as the subject) so in this case, the is just your "b" so you don't need the x.
5. (Original post by Scott3142)
It's simply because the quadratic equation is given as the solution to (ie, it's found by rearranging to get x as the subject) so in this case, the is just your "b" so you don't need the x.
o.o thanks I think i get it

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Updated: November 27, 2010
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