Hello all,

I have a question, "What is the least value of c if 2x^{2 }- 12x + c is never negative?"

I'm guessing that means c must be found when 2x^{2}- 12x + c = 0, but I'm not sure what kind of answer I'm supposed to get.

thanks

Results 1 to 2 of 2

- May 4th 2013, 06:23 PM #1

- Joined
- Apr 2013
- From
- Sydney
- Posts
- 17
- Thanks
- 2

- May 4th 2013, 08:15 PM #2

- Joined
- Jul 2012
- From
- INDIA
- Posts
- 828
- Thanks
- 209

## Re: Help please

I think we can reason it out like this. We want

2x^2 - 12 x + c >=0

2x(x - 6 ) >= - c

That is it. For all those values of c for which the above inequality holds the function will never be negative.

we can't get definite value because we have one inequality and two variables.