Answer:
Part A: The vertex form is h(x) = (x+7)^2 - 8 .
Part B: The vertex is a minimum. The vertex is (-7,-8).
Part C: The axis of symmetry is x=-7. (axis of symmetry is the x value of the vertex)
Explanation:
This video will help you understand how I got the function into vertex form.
Search: How do you convert from standard form to vertex form of a quadratic Brian McLogan
This will help you find the vertex
Search: Finding the vertex of a parabola in standard form khan academy