Find the vertex of the parabola whose equation is y = x2 + 2x + 9.
The vertex of the parabola whose equation is y = x^2 + 2x + 9 is (-1,8). x = -2/(2*1) = -2/2 = -1 when x = -1 y = (-1)^2 + 2*(-1) + 9 y = 1 - 2 + 9 y = 8
Question
Updated 2/6/2015 1:04:22 AM
Rating
3
The vertex of the parabola whose equation is y = x^2 + 2x + 9 is (-1,8).
x = -2/(2*1) = -2/2 = -1
when x = -1
y = (-1)^2 + 2*(-1) + 9
y = 1 - 2 + 9
y = 8
Confirmed by jeifunk [2/6/2015 1:28:51 AM]

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