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Class 10MathematicsQuadratic EquationsRoots of a Quadratic EquationEasyLevel 31
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If (x=3) is a root of (2x^2-7x+k=0), what will be the value of (k)?

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Answer and explanation

Correct answer: (3)

Putting (x=3) gives (18-21+k=0), so (k=3). In such questions substitute the given root directly into the equation.

Related tags

RootsParameterSubstitution

Frequently asked questions

What is the correct answer to this question?

(3)

Why is this the correct answer?

Putting (x=3) gives (18-21+k=0), so (k=3). In such questions substitute the given root directly into the equation.

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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