Răspuns :

x^2-5x+6=0

a=1

b=-5

c=6

delta:(-5)^2-4*1*6

d:25-24

d:1

x1=-b+radical delta/2a=5+1/2=6/2=3

x2=-b-radical din delta/2a=5-1/2=4/2=2

x1^2+x2^2=(x1+x2)^2=(3+2)^2=5^2=25

Bafta!

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