-6x2 -3x +3 = 0
ax2 bx c = 0
a = -6
b = -3
c = 3
Δ = b2-4ac
Δ = -3² - (4 * -6 * 3)
Δ = 9 - (4*-18)
Δ = 9 - (-72)
Δ = 81 Δ > 0
-6x2-3x+3=0
x = -b ∓ √Δ 2a
x' = 3 - √81 2*-6 = 3 - 9.0 -12 = -6.0 -12 = 0.5
x" = 3 + √81 2*-6 = 3 + 9.0 -12 = 12.0 -12 = -1.0
x' = 18.0
x" = -36.0
S = {x ∈ R / x' = 18.0, x" = -36.0 }