Respostas

2013-09-02T19:22:46-03:00
y = ax² + bx + c, com a = 2, b = -4 e c = 5

X_vértice = -b/2a = - (-4)/(2.2) = 4/4 = 1

Y_vértice = -delta/4a ---> delta = b² - 4ac = 16 - 4.2.5 = -24 ---> Y_vértice = -(-24)/(4.2) = 24/8 =3

V = vértice = (1,3)

1 5 1
2013-09-02T19:26:46-03:00
Vértice X= -b/2a --> 4/2.2= 1
Vértice y = - delta/4a (-4)² -4.2.5/4.2 = 24/8= 3
Coordenadas do vétice (1,3)