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What is the nature of the roots of the equation \\(10x^2-19x+6=0\\)?

Answer and explanation

Correct answer: Two real, rational and distinct roots

The discriminant is \\(D=b^2-4ac=(-19)^2-4(10)(6)=121\\). Since \\(D>0\\), the roots are real and distinct. Also, \\(121\\) is a perfect square, so both roots are rational. In fact, the roots are \\(x=\frac{2}{5}\\) and \\(x=\frac{3}{2}\\). Therefore, option A is correct; option D is incorrect because the discriminant is a perfect square. Exam tip: Use \\(D>0\\) for distinct real roots, and check whether \\(D\\) is a perfect square to decide if they are rational.

Related tags

Quadratic EquationsNature Of RootsDiscriminantRational RootsClass 10 MathematicsMathematicsClass 10 Mcq

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