-12x2 -x +11 = 0
ax2 bx c = 0
a = -12
b = -1
c = 11
Δ = b2-4ac
Δ = -² - (4 * -12 * 11)
Δ = 1 - (4*-132)
Δ = 1 - (-528)
Δ = 529 Δ > 0
-12x2-x+11=0
x = -b ∓ √Δ 2a
x' = 1 - √529 2*-12 = 1 - 23.0 -24 = -22.0 -24 = 0.916666666667
x" = 1 + √529 2*-12 = 1 + 23.0 -24 = 24.0 -24 = -1.0
x' = 132.0
x" = -144.0
S = {x ∈ R / x' = 132.0, x" = -144.0 }