2xla patrat minus 5x plus 2 egal 0 ajutatima

Răspuns :

2x²-5x+2=0
a=2; b=-5; c=2
Δ=(-5)²-4×2×2
Δ=25-16
Δ=9⇒√Δ=√9⇒Δ=3
x1=-b+√Δ/2a= 5+3/4=8/4=2
x2=-b-√Δ/2a=5-3/4=2/4=1/2