Delta = b^2-4ac
delta=(-5)^2-4*1*6
delta=25-24
delta=1
x1=-b-radical delta/2a
x1=-(-5)-1/2
x1=5-1/2
x1=2
x2=-b+radical delta/2a
x2=-(-5)+1/2
x2=5+1/2
x2=3
x² - 5 x + 6 = 0
Δ = b² - 4 a c = 25 - 24
Δ = 1
x = ( - b ± √Δ ) / 2 a
x₁ = ( 5 + √1 ) / 2 ⇒ x₁ = 6 / 2 ⇒ x₁ = 3
x₂ = ( 5 - 1 ) / 2 ⇒ x₂ = 4 / 2 ⇒ x₂ = 2
