-3x2 +14x -11 = 0
ax2 bx c = 0
a = -3
b = 14
c = -11
Δ = b2-4ac
Δ = 14² - (4 * -3 * -11)
Δ = 196 - (4*33)
Δ = 196 - (132)
Δ = 64 Δ > 0
-3x2+14x-11=0
x = -b ∓ √Δ 2a
x' = -14 - √64 2*-3 = -14 - 8.0 -6 = -22.0 -6 = 3.66666666667
x" = -14 + √64 2*-3 = -14 + 8.0 -6 = -6.0 -6 = 1.0
x' = 33.0
x" = 9.0
S = {x ∈ R / x' = 33.0, x" = 9.0 }