Question

Determine pra mim,Por favor.Y=x²-2X+5

Answer 1

∆ = b² - 4 . a . c
∆ = (-2)² - 4 . 1 . 5
∆ = 4 - 20
∆ = -16

xV = -b / 2a
xV = -(-2) / (2 . 1)
xV = 2 / 2
xV = 1

yV = -∆ / 4a
yV = -(-16) / (4 . 1)
yV = 16 / 4
yV = 4

Logo, as coordenadas do vértice são:
V(1, 4)