Quadratic function

For discussing Olympiad Level Algebra (and Inequality) problems
Ashfaq Uday
Joined:Tue Sep 27, 2011 12:18 am
Quadratic function

Unread post by Ashfaq Uday » Tue Nov 08, 2011 9:14 pm

could somebody please explain me why a discriminant has to be negative for a quadratic function to be positive?? when a quadratic function is positive, does it refer that it's value is positive or the signs are all positive??

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