Fie [tex] f(x)=aX^{2}+bX+c[/tex]->un polinom de gradul 2,unde a,b,c∈ R,C etc.
Folosind
[tex]\Delta=b^{2}-4ac[/tex]
Daca [tex]\Delta[/tex]<0 atunci ecuatia ta nu are radacini reale(are 2 radacini complexe)
Daca [tex]\Delta[/tex]=0 atunci [tex]x_{1}=x_{2}=\frac{-b}{2a}[/tex]
Daca [tex]\Delta[/tex]>0 atunci avem relatia:
[tex]x_{12}=\frac{-b+-\sqrt{\Delta}}{2a}[/tex]
De unde :
[tex]x_{1}=\frac{-b+\sqrt{\Delta}}{2a}[/tex]
[tex]x_{2}=\frac{-b-\sqrt{\Delta}}{2a}[/tex]
Sper ca ai inteles.
