You are Here: Home >< Maths

Help needed with a discriminant question (Pure Maths)

1. The quadratic y = kx2 - 2 + kx + x has discriminant equal to -24. How do I find the value of k?

So far, I got:
a = k
b = k +1
c = -2
2. (Original post by honour)
The quadratic y = kx2 - 2 + kx + x has discriminant equal to -24. How do I find the value of k?

So far, I got:
a = k
b = k +1
c = -2
Discriminant =
3. (Original post by NotNotBatman)
Discriminant =
Are my values for a, b and c right though?
4. (Original post by honour)
Are my values for a, b and c right though?
Yes.
5. (Original post by NotNotBatman)
Yes.
Okay thanks

Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: October 12, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

Haven't started revising yet?

It's not too late!

Poll
Useful resources

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

How to use LaTex

Writing equations the easy way

Study habits of A* students

Top tips from students who have already aced their exams

Chat with other maths applicants