Question

rezolvarea unei functii de gradul al 2 lea

Answer 1

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