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If f(x) = x³ and g(x) = x, which of the following is equal to (f − g)(x)?

Answer and explanation

Correct answer: x(x − 1)(x + 1)

By the definition of the difference of functions, (f − g)(x) = f(x) − g(x) = x³ − x. Factoring out x gives x(x² − 1), and the difference-of-squares identity gives x(x − 1)(x + 1). Therefore, option A is correct.

Related tags

Relations And FunctionsAlgebra Of FunctionsAlgebra Of Real FunctionsMathematicsClass 11 Mcq

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