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What is the nature of the roots of the quadratic equation \(9x^2-6x+1=0\)?

Answer and explanation

Correct answer: two real and equal

Here, \(a=9\), \(b=-6\), and \(c=1\). The discriminant is \(D=b^2-4ac=(-6)^2-4(9)(1)=36-36=0\). When \(D=0\), the roots are real and equal; in fact, the repeated root is \(x=\frac{1}{3}\). Exam tip: Use the sign of the discriminant to determine the nature of the roots.

Related tags

Quadratic EquationsDiscriminantNature Of RootsEqual RootsMathematicsClass 10 Mcq

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