What’s the vertex y=-1/2(x+3)^2-1

vertex = (- 3, - 1 )

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

y = - (x + 3)² - 1 ← is in vertex form

with vertex = (- 3, - 1 )

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