Cum se rezolva?!!!va rog, dau coroana!

Cum Se Rezolvava Rog Dau Coroana class=

Răspuns :

x1+x2=2a

x1x2=-2a (Viete)

2+x2=2a

2x2=-2a=-(2+x2)

2x2=-2-x2

3x2=-2

x2=-2/3

a=(2+x2)/2=(2-2/3):2=(4/3):2=2/3

ecuiatia devine

x²-4x/3-4/3=0

verificare pt x=2

4-8/3-4/3=4-4=0 verifica

pt x=-2/3

4/9 - (4/3) *(-2/3)-4/3=4/9+8/9-4/3=12/9-4/3=4/3-4/3=0 verifica