Precalculus : Find the Vertex and the Axis of Symmetry of a Parabola

Study concepts, example questions & explanations for Precalculus

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Example Questions

Example Question #1281 : Pre Calculus

Find the vertex of the parabola:

Possible Answers:

Correct answer:

Explanation:

The vertex form for a parabola is given below:

  

To complete the square, take the value next to the x term, divide by 2 and raise the number to the second power. In this case, . Then take value and add it to add inside the parenthesis and subtract on the outside. 

Now factor and simplify:

Fromt the values of  and , the vertex is at 

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