-12x2 -17x -6 = 0
ax2 bx c = 0
a = -12
b = -17
c = -6
Δ = b2-4ac
Δ = -17² - (4 * -12 * -6)
Δ = 289 - (4*72)
Δ = 289 - (288)
Δ = 1 Δ > 0
-12x2-17x-6=0
x = -b ∓ √Δ 2a
x' = 17 - √1 2*-12 = 17 - 1.0 -24 = 16.0 -24 = -0.666666666667
x" = 17 + √1 2*-12 = 17 + 1.0 -24 = 18.0 -24 = -0.75
x' = -96.0
x" = -108.0
S = {x ∈ R / x' = -96.0, x" = -108.0 }