-6x2 +23x -10 = 0
ax2 bx c = 0
a = -6
b = 23
c = -10
Δ = b2-4ac
Δ = 23² - (4 * -6 * -10)
Δ = 529 - (4*60)
Δ = 529 - (240)
Δ = 289 Δ > 0
-6x2+23x-10=0
x = -b ∓ √Δ 2a
x' = -23 - √289 2*-6 = -23 - 17.0 -12 = -40.0 -12 = 3.33333333333
x" = -23 + √289 2*-6 = -23 + 17.0 -12 = -6.0 -12 = 0.5
x' = 120.0
x" = 18.0
S = {x ∈ R / x' = 120.0, x" = 18.0 }