Question

Encontre as coordenadas do vértice do gráfico da f(x)= x²-7x+12

Answer 1

f(x)= x²-7x+12

Δ=b²-4.a.c
Δ=-7²-4.1.12
Δ=49-48
Δ=1

Xv=-b/2a
Xv=-(-7)/2.1
Xv=7/2

Yv=-Δ/4a
Yv=-1/4.1
Yv=-1/4

Vértice (7/2,-1/4) ou (3.5 , -0.25)

Answer 2

Vejamos: f(x) = x^2 - 7x + 12 ∆ = b^2 - 4ac ∆ = (-7)^2 - 4.1.12 ∆ = 49 - 48 ∆ = 1 Xv = -b/2a Xv = -(-7)/2.1 Xv = 7/2 Yv = ∆/2a Yv = 1/2.1 Yv = 1/2 Logo, o vértice será (7/2, 1/2)