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Signs of a, b and c in Quadratic Equations | Range of Quadratic Polynomials
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This lesson takes up the sign of a,b and c along with range of Quadratic Functions

Vineet Loomba is teaching live on Unacademy Plus

Vineet Loomba
IITian | No. 1 Educator in IIT-JEE (Maths) | 3 Million Minutes Watch Time | 8+ Years Experience | Youtube: Maths Wallah | vineetloomba.com

Comments
(10)
Unacademy user
Mam your bilingual class is awsumn able to understand prominently
Vanmala Ramesh
a year ago
Watch my summary analysis too.
sir the range of a is -(root)5 to (root)5 but a is always greater than 0, so the range of a should be (0,(root)5)
sir in last question since inequality is <0 then why answer will be (-√5,√5) ?
Vineet Loomba
13 days ago
u have to study wavy curve method to solve such inequalities ..see my sets relation function course
In range if a<0 y€(-infinity, -D/4a) why this is open bracket at last
Why u have taken D < 0 ? Couldn't able to understand.
sir why did we apply the wavy curve method here unlike other problems. why didn't you write a=-√5 ;a=√5
Vineet Loomba
2 months ago
Because here it is inequality and not equality
Archana Goswami
2 months ago
oooh. yeah... I got it... thanks
Archana Goswami
2 months ago
so sorry for asking such a silly doubt...
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