9514 1404 393
Answer:
(5, 1) or maybe (h, k)
Explanation:
The given form has no letters other than the variable. The vertex in this vertex-form equation can be read from the expression as (5, 1).
In the generic vertex form ...
f(x) = a(x -h)² +k
the letters (h, k) are used to represent the vertex.
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You would need to consult your curriculum materials to see what letters your author uses for the vertex in vertex form.