Question

Qual a coordenada ( x, y ) do vértice da parábola que representa y = x² + 6x +8

Answer 1

$x^{2}+6x+8=0\\\Delta=6^2-4.1.8\\\Delta=36-32\\\Delta=4$

$X_V= \frac{-b}{2a}$

$X_V= \frac{-6}{2}$

$X_V=-3$

$X_Y= \frac{-\Delta}{4a}$

$X_Y= \frac{-4}{4}$

$X_Y=-1$

$V=(-3,-1)$