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Read the statement: The equation \(x^2+1=0\) has no real roots because its discriminant is \(D<0\). How is this statement?

Answer and explanation

Correct answer: Correct

For \(x^2+1=0\), \(a=1, b=0, c=1\). Thus, the discriminant is \(D=b^2-4ac=0^2-4(1)(1)=-4<0\). A quadratic equation with a negative discriminant has no real roots, so the statement is correct. Exam tip: For \(D<0\), write ‘no real roots.’

Related tags

Quadratic EquationsNature Of RootsDiscriminantNo Real RootsMathematicsClass 10 Mcq

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