- AGreater than or equal to 0
- BStrictly less than 0
- CEqual to 1
- DAlways positive
Step-by-Step Solution
Real roots exist when D >= 0 (D > 0 gives distinct roots, D = 0 gives equal roots).
Answer: A) Greater than or equal to 0
If a quadratic equation has real roots, then its discriminant must be:
Class 10Discriminant and Nature of RootsAlgebra — Quadratics
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