Find the Vertex and Axis of Symmetry of the Graph $$f ( x ) = x ^ { 2 } + 8 x + 21$$

question 161

Multiple Choice

Find the vertex and axis of symmetry of the graph of the function.
- $$f ( x ) = x ^ { 2 } + 8 x + 21$$

• A)vertex: (5, -16); x = 5
• B)vertex: (5, -4); x = 5
• C)vertex: (-5, 4); x = -5
• D)vertex: (-4, 5); x = -4

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