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What is the vertex of the graph of the function \(f(x)=x^2+2x+1\)?

Answer and explanation

Correct answer: \((-1,0)\)

The function can be written as \(f(x)=x^2+2x+1=(x+1)^2\). Comparing this with the standard form \(y=(x-h)^2+k\), we get \(h=-1\) and \(k=0\). Hence, the vertex is \((-1,0)\). The point \((0,1)\) is the y-intercept, not the vertex. Exam tip: After completing the square, read the vertex directly from \((x-h)^2+k\) as \((h,k)\).

Related tags

Standard-FunctionsQuadratic-FunctionVertex-FormGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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