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Assertion: x²−6x+11=0 has real and irrational roots. Reason: Its D=-8. Choose the correct option.

Answer and explanation

Correct answer: Assertion is false, but the reason is true

First verify the reason by calculating the discriminant. In x²−6x+11=0, a=1, b=-6, and c=11. Therefore D=b²−4ac=(-6)²−4(1)(11)=36−44=-8. The reason is true. Since D<0, the quadratic equation has no real roots; its roots are a complex conjugate pair. Consequently, the assertion that the roots are real and irrational is false. The word irrational applies to non-real? No: irrational numbers are real numbers that cannot be expressed as a ratio of integers, so these complex roots are not called irrational roots. Thus option A correctly states that the assertion is false while the reason is true. The other choices either incorrectly accept the assertion or reject the correctly calculated discriminant.

Related tags

Quadratic-EquationsAssertion-ReasonDiscriminantNature Of RootsQuadratic EquationsMathematicsClass 10 Mcq

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