Asked by Kathy
Where is the vertex of the graph of
y = -x squared + 4x + 5
y = -x squared + 4x + 5
Answers
Answered by
Damon
x^2 - 4 x - 5 = -y
x^2 - 4 x = -y + 5
x^2 - 4 x + 4 = -y + 9
(x-2)^2 = -(y-9)
so
(2,9)
x^2 - 4 x = -y + 5
x^2 - 4 x + 4 = -y + 9
(x-2)^2 = -(y-9)
so
(2,9)
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