Asked by tracy
The vertex of y = 9 - 8x - x^2 is (-4, 25)
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Answers
Answered by
Reiny
the x of the vertex is -b/(2a) = 8/-2 = -4
so far so good
sub x=-4 into equation and see if you get 25
so far so good
sub x=-4 into equation and see if you get 25
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