Question

determine as coordenadas do vertice v da parabola que representa a funçao f(x) = x² - 2x - 3:

Answer 1

x=-b/2a 
x=-(-2)/2 
x=1 

y=-∆/4a 
∆=(-2)²-4(1)(-3)= 
4+12=16 
y=-16/4 
y=-4 

V=(1,-4)