-12x2 -x +1 = 0
ax2 bx c = 0
a = -12
b = -1
c = 1
Δ = b2-4ac
Δ = -² - (4 * -12 * 1)
Δ = 1 - (4*-12)
Δ = 1 - (-48)
Δ = 49 Δ > 0
-12x2-x+1=0
x = -b ∓ √Δ 2a
x' = 1 - √49 2*-12 = 1 - 7.0 -24 = -6.0 -24 = 0.25
x" = 1 + √49 2*-12 = 1 + 7.0 -24 = 8.0 -24 = -0.333333333333
x' = 36.0
x" = -48.0
S = {x ∈ R / x' = 36.0, x" = -48.0 }