-12x2 -6x +6 = 0
ax2 bx c = 0
a = -12
b = -6
c = 6
Δ = b2-4ac
Δ = -6² - (4 * -12 * 6)
Δ = 36 - (4*-72)
Δ = 36 - (-288)
Δ = 324 Δ > 0
-12x2-6x+6=0
x = -b ∓ √Δ 2a
x' = 6 - √324 2*-12 = 6 - 18.0 -24 = -12.0 -24 = 0.5
x" = 6 + √324 2*-12 = 6 + 18.0 -24 = 24.0 -24 = -1.0
x' = 72.0
x" = -144.0
S = {x ∈ R / x' = 72.0, x" = -144.0 }