Question 1203271
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Hint:


Let a = -1 and consider f(x) = -1(x+1)^2


The parabola f(x) = -1(x+1)^2 is in vertex form y = a(x-h)^2+k with vertex (h,k) = (-1,0)


For this example f(0) = -1 and f(-1) = 0
f(-1) is the largest output possible because it's at the vertex peak. This parabola opens downward.
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