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If the discriminant of a quadratic equation is D = (a − 1)² + 5, where a is a real number, which statement correctly describes the nature of its roots?

Answer and explanation

Correct answer: Always real and distinct

For every real value of a, (a − 1)² ≥ 0, so D = (a − 1)² + 5 ≥ 5 > 0. A quadratic equation with a positive discriminant has two real and distinct roots; therefore, option A is correct.

Related tags

Quadratic EquationsDiscriminantNature Of RootsMathematicsClass 10 Mcq

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