Question

2) Determine as coordenadas (xv, yv) do vértice da função y = -2x2
+ 8x – 6

a) (-2, -6)
b) (6, -6)
c) (1, -4)
d) (2, 2)
e) (4, -6)

Answer 1

Resposta: D) (2,2)

Explicação passo a passo:

Xv= -b

2a

Xv= -(+8)

2.(-2)

Xv= 8

4

Xv=+2

Delta=b2-4.a.c

Delta=16-4.(-2).6

Delta=32-4.6

Delta=32-24

Delta=8

Yv= Delta

4a

Yv= (+8)

4.(-2)

Yv= -8

-4

Yv= +2

X Y

R: (2,2)