Question

Qual o vértice da parábola y= 4 - x²

Answer 1

y=4-x²
y=-x²+4
Xv=$- \frac{b}{2a} = \frac{0}{2} =0$

Yv=-Δ/4a=$\frac{-16}{-4} =4$

Δ=b²-4ac
Δ=o-4(-1)(4)
Δ=16

V(0,4)