Question

Determina a coordenadas x y do vertice ds parabola representa s seguinte funcao y=2x2-4x-1

Answer 1

xv=-b/2a
xv=-(-4)/2×2
xv=4/4
xv=1

▲=b^2-4ac
▲=16-4×2×(-1)
▲=16+8
▲=24

yv=-▲/4a
yv=-24/8
yv=-3

coordenadas do vértice → (1,-3)