👤

[tex] 5x^{2} [/tex] - 9x - 2 = 0 .. Aflati Δ , x1 , x2

Răspuns :

Δ=b²-4ac= 81 +40=121
x1=(-b-√Δ) /2a=(9-11)/10=-2/10=-1/5
x2=(-b+√Δ) /2a=(9+11)/10=20/10=2