Question

Determine o vértice da parábola.

F(x)= 2x²-6x-1

Answer 1

f(x)= 2x²- 6x - 1

a = 2
b = - 6
c = - 1

Xv = - b/2a
Xv = - (- 6)/2.2
Xv = 6/4 ÷ 2
Xv = 3/2

∆ = b² - 4ac
∆ = (- 6)² - 4.2.(- 1)
∆ = 36 + 8
∆ = 44

Yv = - ∆/4a
Yv = - 44/4.2
Yv = - 44/8 ÷ 4
Yv = - 11/2

V (3/2 ; - 11/2)