Question

determine as coordenadas do vértice da parabola do grafico da função f(x)=x-2x-15

Answer 1

$a=1, b=-2, c=-15$
$\Delta = b^{2} -4ac = 64$

$Xv = \frac{-b}{2a}$
$Xv = \frac{2}{2} = 1$


$Yv = \frac{-\Delta}{4a}$
$Yv = \frac{64}{4} = 16$

$V = (1, 16)$