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Class 10MathematicsQuadratic EquationsRoots of a Quadratic EquationMediumLevel 31
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If (x=2) is a root of (ax^2-5x+2=0), what is the value of (a)?

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Answer and explanation

Correct answer: (2)

Putting (x=2) gives (4a-10+2=0), so (4a=8) and (a=2). Substitute in questions with an unknown coefficient.

Related tags

RootsParameterLeading Coefficient

Frequently asked questions

What is the correct answer to this question?

(2)

Why is this the correct answer?

Putting (x=2) gives (4a-10+2=0), so (4a=8) and (a=2). Substitute in questions with an unknown coefficient.

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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