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rezolvati inecuatia
x²-3x-10≤0


Răspuns :

a=1;b=-3;c=-10
delta=b^2-4ac=(-3)^2-4*1*(-10)=9+40=49
radical49=7
x1=-b-radical delta/2a=3-7/2=-4/2=-2
x2=-b+radical delta/2a=3+7/2=10/2=5