Răspuns :
=>a=2; b=-7' c=5'
Δ=b²-4ac=49-40=9 => √Δ=3
x1/x2=-b +- √Δ / 2a
x1= 7+3/4=10/4=5/2=2,5
x2=7-3/4=4/4=1
Δ=b²-4ac=49-40=9 => √Δ=3
x1/x2=-b +- √Δ / 2a
x1= 7+3/4=10/4=5/2=2,5
x2=7-3/4=4/4=1