Respostas

2013-09-23T11:55:04-03:00
-x²+6x-9 = 0 x (-1)

x² - 6x + 9 = 0

Δ = 36 - 36

Δ = 0

x' = x" = 6/2

x' = x" = 3

As coordenadas do vértice:

XV = - b/2a

XV = - 6/- 2

XV = 3

YV = - Δ/4a

YV = 0

V(3, 0)
3 3 3