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Which of the following quadratic equations has real and distinct roots?

Answer and explanation

Correct answer: x² − 3x + 2 = 0

For a quadratic equation ax² + bx + c = 0, the discriminant is Δ = b² − 4ac. In option A, Δ = (−3)² − 4(1)(2) = 1 > 0, so its roots are real and distinct. Options B and D have Δ = 0, giving equal roots, while option C has Δ = −3 < 0, so its roots are not real. Exam tip: Δ > 0 indicates real and distinct roots.

Related tags

Quadratic EquationsNature Of RootsDiscriminantReal RootsDistinct RootsMathematicsClass 10 Mcq

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