-6x2 -17x -12 = 0
ax2 bx c = 0
a = -6
b = -17
c = -12
Δ = b2-4ac
Δ = -17² - (4 * -6 * -12)
Δ = 289 - (4*72)
Δ = 289 - (288)
Δ = 1 Δ > 0
-6x2-17x-12=0
x = -b ∓ √Δ 2a
x' = 17 - √1 2*-6 = 17 - 1.0 -12 = 16.0 -12 = -1.33333333333
x" = 17 + √1 2*-6 = 17 + 1.0 -12 = 18.0 -12 = -1.5
x' = -48.0
x" = -54.0
S = {x ∈ R / x' = -48.0, x" = -54.0 }