Question

9. O vértice da parábola formada
f (x)=x² - 5x + 6 terá as coordenadas:

a) (-4/2, -4/2)
b) (-5/2 ,-1/2)
c) (5/2 , -1/4)
d) (5, -4)
e) (2/5 , -1)

Answer 1

Vy = -Δ/4a
Vx = -b/2a
y = x² - 5x + 6
a = 1, b = -5 e c = 6
Δ = b² - 4ac
Δ = (-5)²-4.1.6
Δ = 25 - 24
Δ = 1
======================
Yv = - 1 / 4
======================
Xv = - (-5) / 2
Xv = 5/2

V = (5/2 ; -1/4)
ALTERNATIVA C