-12x2 +22x +14 = 0
ax2 bx c = 0
a = -12
b = 22
c = 14
Δ = b2-4ac
Δ = 22² - (4 * -12 * 14)
Δ = 484 - (4*-168)
Δ = 484 - (-672)
Δ = 1156 Δ > 0
-12x2+22x+14=0
x = -b ∓ √Δ 2a
x' = -22 - √1156 2*-12 = -22 - 34.0 -24 = -56.0 -24 = 2.33333333333
x" = -22 + √1156 2*-12 = -22 + 34.0 -24 = 12.0 -24 = -0.5
x' = 336.0
x" = -72.0
S = {x ∈ R / x' = 336.0, x" = -72.0 }