Question

o vértice da parábola y=2x² - 4x + 5 é o ponto:
a) (1, 3)
b) (1, -3)
c) (-1, 11)
d) (2, 5)

Answer 1

∆=(-4)² -4.2.5= 16 -40= -24

xv = -b/2a = 4/2.2= 4/4= 1

yv = -∆/4a = 24/4.2=24/8= 3

a) (1, 3) ✓