f(x) = (1/4) (x + 2)² - 9 is written in vertex form f(x) = a(x - h)² + k where (h, k) is the vertex
so for the given quadratic:
h = -2 ... [b/c - -2 = +2]
k = -9
so the vertex is at (-2, -9)
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f(x) = (1/4) (x + 2)² - 9 is written in vertex form f(x) = a(x - h)² + k where (h, k) is the vertex
so for the given quadratic:
h = -2 ... [b/c - -2 = +2]
k = -9
so the vertex is at (-2, -9)