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If f(x) = x² − 25 and g(x) = x + 5, what is the simplified form of (f/g)(x), where x ≠ −5?

Answer and explanation

Correct answer: x − 5

By definition, (f/g)(x) = f(x)/g(x) = (x² − 25)/(x + 5). Factor the numerator as a difference of squares: x² − 25 = (x − 5)(x + 5). Since x ≠ −5, the denominator is nonzero and the common factor can be cancelled, giving (f/g)(x) = x − 5. Therefore, option A is correct.

Related tags

Quotient Of FunctionsFactorizationDifference Of SquaresAlgebra Of Real FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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