Question

determine as coordenadas do vértice da parábola que representa a função F(x)=-x2+4x-5

Answer 1

$x_{v}= \frac{-b}{2a}= \frac{-4}{-2} =2$
$y_{v}= \frac{-delta}{4a} = \frac{4}{-4} = -1$

As coordenadas serão (2, -1)