Question

Obtenha as coordenadas do vértice da parábola.

Answer 1

c = -4

y = ax^2 + bx -4

4 = 4a +2b

4 = 16a - 4b

a = 1/2

b = 1

Vértice:

xv = -b/2a

xv = -1

yv = -(b^2-4ac)/4a

yv = -(1+8)/2

yv = -9/2

yv = -4,5

Vértice: (-1, -4,5)