Se noteaza cu a,b,c indicii ecuatiei, astfel: a=1: b=m; c=n
[tex] x_{V} =- \frac{b}{2a} =- \frac{m}{2} [/tex]=3=> m=-6
[tex] y_{V} =- \frac{delta}{4a} = \frac{4n- m^{2} }{4} [/tex]
Δ=[tex] m^{2} -4n[/tex]
m=-6=> [tex] \frac{4n-36}{4}=5 [/tex]
4n-36=20
4n=56
n=14
