-12x2 -14x +6 = 0
ax2 bx c = 0
a = -12
b = -14
c = 6
Δ = b2-4ac
Δ = -14² - (4 * -12 * 6)
Δ = 196 - (4*-72)
Δ = 196 - (-288)
Δ = 484 Δ > 0
-12x2-14x+6=0
x = -b ∓ √Δ 2a
x' = 14 - √484 2*-12 = 14 - 22.0 -24 = -8.0 -24 = 0.333333333333
x" = 14 + √484 2*-12 = 14 + 22.0 -24 = 36.0 -24 = -1.5
x' = 48.0
x" = -216.0
S = {x ∈ R / x' = 48.0, x" = -216.0 }