-6x2 +x +22 = 0
ax2 bx c = 0
a = -6
b = 1
c = 22
Δ = b2-4ac
Δ = ² - (4 * -6 * 22)
Δ = 1 - (4*-132)
Δ = 1 - (-528)
Δ = 529 Δ > 0
-6x2+x+22=0
x = -b ∓ √Δ 2a
x' = -1 - √529 2*-6 = -1 - 23.0 -12 = -24.0 -12 = 2.0
x" = -1 + √529 2*-6 = -1 + 23.0 -12 = 22.0 -12 = -1.83333333333
x' = 72.0
x" = -66.0
S = {x ∈ R / x' = 72.0, x" = -66.0 }