Question

determine o vertice V da parabola que represente a funçao quadratica:

f(x)= x2_2x-3

Answer 1

Delta : b^2 -4ac = 4 -4.1.-3 = 4+12=16
Xv= -b/2a= -(-2)/2.1= 2/2= 1
Yv= - Delta/4a = -16/4.1 = -4
V(1,-4)