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Subjects
Class 10MathematicsQuadratic EquationsMethods of Solving Quadratic EquationsExpertLevel 35
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What are the roots of (x^2-12x+11=0) by quadratic formula?

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Answer and explanation

Correct answer: (x=1,11)

(D=(-12)^2-4(1)(11)=100), so (x=\frac{12\pm10}{2}) gives (1) and (11). In exams, if (D) is a perfect square, simplify quickly.

Related tags

QuadraticQuadratic-FormulaPerfect-Square-Discriminant

Frequently asked questions

What is the correct answer to this question?

(x=1,11)

Why is this the correct answer?

(D=(-12)^2-4(1)(11)=100), so (x=\frac{12\pm10}{2}) gives (1) and (11). In exams, if (D) is a perfect square, simplify quickly.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Quadratic Equations. Topic: Methods of Solving Quadratic Equations.

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