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If \(f(x)=x^2-2x+2\) and \(g(x)=x^2+2x+2\), where \((fg)(x)=f(x)g(x)\), what is the value of \((fg)(0)\)?

Answer and explanation

Correct answer: 4

Substituting \(x=0\), we get \(f(0)=0^2-2(0)+2=2\) and \(g(0)=0^2+2(0)+2=2\). By the definition of the product function, \((fg)(0)=f(0)g(0)=2\times2=4\), so option C is correct. Option B may result from using the value of only one function. In an exam, remember that \((fg)(x)\) denotes the product of \(f(x)\) and \(g(x)\), not their sum.

Related tags

Relations-FunctionsAlgebra-Real-FunctionsProduct-FunctionsFunction-EvaluationSubstitutionAlgebra Of Real FunctionsRelations And FunctionsMathematics

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