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19 July, 15:01

What is the y-value of the vertex of the function f (x) = - (x - 3) (x + 11) ?

The y-value of the vertex is

+5
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  1. 19 July, 17:47
    0
    You can factor it out to get - x^2-8x+33, since the x of vertex is - b/2a, the x coordinate is - 4, and plug it back in you would get 49
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