Question

2x²-3x-2<0; rezolvati inecuatia in R...

Answer 1

∆=(-3) la a 2 -4•2•(-2) ∆=9+16 ∆=25=5 X1=-b-∆/2a=3-5/4=-1/2 X2=-b-∆/2a=3+5/4=2 X apartine {2}