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What is called a root of a quadratic equation?

Answer and explanation

Correct answer: The value that satisfies the equation

The governing concept is the definition of a root or solution. A root of an equation is a value of the variable that makes the equation true after substitution. For a quadratic equation ax² + bx + c = 0, a number r is a root when ar² + br + c = 0. For example, in x² − 5x + 6 = 0, substituting x = 2 gives 4 − 10 + 6 = 0, so 2 is a root; x = 3 also works. A coefficient describes how a term is scaled, the constant term is the term independent of x, and the degree is the highest exponent. These identify features of the equation, not its root. Therefore option A is the only correct definition.

Related tags

Quadratic-EquationsDefinition-Of-RootAlgebra-BasicsRoots Of A Quadratic EquationQuadratic EquationsMathematicsClass 10 Mcq

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