Question

Qual a vertice de f(x) = -4 x² + 4x -1

Answer 1

Xv = -b/2a
Xv = -4/2.(-4)
Xv = 1/2

Yv = -4.(1/2)² + 4/2 - 1
Yv = -1 + 2 - 1
Yv = 0

Ou, usava Yv = -Δ/4a
Yv = -(16 - 4.(-4).(-1)/4.(-4)
Yv = 0/-16
Yv = 0