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If \(f(x)=x^2\), \(g(x)=2x\), and \(h(x)=1\), what is the simplified form of the combined function \((f-g+h)(x)\)?

Answer and explanation

Correct answer: \((x-1)^2\)

Algebraic operations on functions are performed in the stated order: \((f-g+h)(x)=f(x)-g(x)+h(x)=x^2-2x+1\). Therefore, it simplifies to \((x-1)^2\). In option B, the sign of the middle term is incorrectly changed to \(+2x\). Exam tip: when subtracting a function, carefully retain the negative sign for all its terms.

Related tags

Relations-FunctionsAlgebra-Of-FunctionsCombined-FunctionsPerfect-SquareAlgebra Of Real FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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