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Choose the correct statement about the nature of the roots of the equation \(x^2+9=0\).

Answer and explanation

Correct answer: No real roots

Here, \(a=1\), \(b=0\), and \(c=9\). The discriminant is \(D=b^2-4ac=0^2-4(1)(9)=-36<0\), so the equation has no real roots. In fact, its roots are \(\pm 3i\), which are complex. Exam tip: For a quadratic equation, \(D<0\) indicates that there are no real roots.

Related tags

Quadratic EquationsNature Of RootsDiscriminantNo Real RootsComplex RootsMathematicsClass 10 Mcq

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