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# C1 June 08 8b watch

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1. Really quick (and probably easy) question.

Given 2qx^2 + qx - 1 = 0 where q has no real roots

I found q^2 + 8q<0

Can someone please tell me how to find the possible values of q? I know you have to factorise but according to the markscheme you have make it =

Side note: how do you make the text into formula style?

Thank you

this should help
3. (Original post by heymynameisben)
Really quick (and probably easy) question.

Given 2qx^2 + qx - 1 = 0 where q has no real roots

I found q^2 + 8q<0

Can someone please tell me how to find the possible values of q? I know you have to factorise but according to the markscheme you have make it =

Side note: how do you make the text into formula style?

Thank you
Factorise out the q so you now have
Then sketch the graph of that (you should be able to tell where the roots are).
Then look at where the graph is below zero and the possible values of q will be given as a range between two points in this case.
4. Wow thats so cool, thanks very much!

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