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What is the nature of the roots of the equation 2x² + 7x + 3 = 0?

Answer and explanation

Correct answer: Real, rational and distinct

Here, a = 2, b = 7 and c = 3. The discriminant is D = b² − 4ac = 7² − 4(2)(3) = 25. Since D > 0, the roots are real and distinct; since 25 is a perfect square, they are also rational. In fact, the roots are −1/2 and −3. Therefore, option A is correct. Exam tip: If D > 0 and D is a perfect square, the roots are real, rational and distinct.

Related tags

Quadratic EquationsNature Of RootsDiscriminantRational RootsMathematicsClass 10 Mcq

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