Resposta:

(Xv, Yv) =(-1/3, -2/3)

Explicaçãopasso-a-passo:

[tex]y = 30x {}^{2} + 20x + 2 \div 2[/tex]

[tex]y = 15x {}^{2} + 10x + 1[/tex]

a=15, b=10 c=1

Xv=-b/2a -10/30=-1/3

Yv=15.(-1/3)²+10.-1/3+1=15.1/9-10/3+1=15/9-10/3+1= 5/3-10/3+1=(5-10+3)/3/=-2/3