Q.
If roots of quadratic equation ${ax}^{2} + 2bx + c = 0$ are not real, then ${ax}^{2} + 2bxy + {cy}^{2} + dx + ey + f = 0$ represents a/an
A) Ellipse
B) Circle
C) Parabola
D) Hyperbola
Explanation
(a)
Given equation is ${ax}^{2} + 2bx + c = 0$. Since, roots are not real
$\therefore\ b^{2} < ac$
$\Rightarrow {ax}^{2} + 2bxy + {cy}^{2} + dx + ey + f = 0$
Can represent an ellipse
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.