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Class 10MathematicsQuadratic EquationsRoots of a Quadratic EquationHardLevel 33
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If (x^2-sx+9=0) has equal and positive roots, what is (s)?

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Answer and explanation

Correct answer: (6)

For equal roots, (s^2-36=0), so (s=\pm6). The equal root is (\frac{s}{2}), which is positive when (s=6).

Related tags

Quadratic-RootsEqual-Positive-RootsParameter

Frequently asked questions

What is the correct answer to this question?

(6)

Why is this the correct answer?

For equal roots, (s^2-36=0), so (s=\pm6). The equal root is (\frac{s}{2}), which is positive when (s=6).

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Quadratic Equations. Topic: Roots of a Quadratic Equation.

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