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Examples on Range of Quadratic Expressions
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This lesson takes up questions involving range of Quadratic Expressions. Other aspects of Range are discussed in Sets relations functions course

Vineet Loomba is teaching live on Unacademy Plus

Vineet Loomba
IITian | No. 1 Educator in IIT-JEE (Maths) | 2.6 Million Minutes Watch Time | 8+ Years Experience | Youtube: Maths Wallah | vineetloomba.com

Comments
(5)
Unacademy user
hello mam your hinu decodes are awsm ty, but arent you going to add more lessons
In the 3rd example sign of b will be negative otherwise -b/4a will be -ve and we want it to be +ve hence keeping the sign -ve so the overall sign of the equation cant be determined
sir why did u took D<0 ?
Shubhangi Kapoor
a month ago
because that is a condition to keep the equation always positive its explained in the previous video
Sir thanks a lot...THis course was very useful and definitely cleared all my previous doubts and confusion regarding concepts... :D
Vineet Loomba
5 months ago
Welcome ..dont forget to rate 5 stars to the course.
Suparno Banerjee
5 months ago
yes sir.. sureee :))
Sir, during a>0, minima has closed brackets , i.e -D/(4a) is included but in a<0 the Maxima is in open brackets i.e it is not included . Please explain why so?
Vineet Loomba
5 months ago
There is no open or closed brackets..that is (x,y) point and not interval..use ay bracket
Akshat Dhanuka
5 months ago
thanks