daca imi cere solutii reale fara a specifica daca x1 si x2 sunt egale sau distincte,pun conditia ca Δ ≥ 0.
Δ=[-(m+3)]²-4*1*(-m)
Δ=m²+6m+9 + 4m
Δ=m²+10m+9 ≥0
m²+10m+9=0
Δ'=100-36
Δ'=64
m1=-1
m2=-9
m |-∞ -9 -1 +∞
m²+10m+9 |+++++++ 0-------------------- 0++++++++++++
m∈(-∞;-9] reunit cu [-1;+∞)
