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Consider the graph of quadratic trinomial y = ax² + bx + c as shown below where X1 and X2 are roots of equation ax²+bx+c. which of the following is/are correct ?(A) a-b-c 0 (D) b and c have the same sign different from a.

Grade:12th pass

1 Answers

Harshit Singh
askIITians Faculty 5898 Points
15 days ago
Dear Student

your first part is unclear,please post it in separate thread.

(b) since parabola is downward, a<0
maxima is at Ist quadrant where x is positive,
at maxima or minima , x= -b/2a
since x= +ve and a= -ve, b should be positive
Y intersept is +ve , so c will also be positive
hence
a is negative, b and c are positive

Thanks

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