Class 11Mathematics4-2.Quadratic Equations and InequationsSolution of quadratic equations and Nature of roots
MediumWhen are the roots of the quadratic equation $ax^2 + bx + c = 0$ imaginary?
- A$b^2 - 4ac < 0$
- B$b^2 - 4ac > 0$
- C$b^2 - 4ac = 0$
- D$b^2 - 4ac \geq 0$
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