-12x2 -13x +22 = 0
ax2 bx c = 0
a = -12
b = -13
c = 22
Δ = b2-4ac
Δ = -13² - (4 * -12 * 22)
Δ = 169 - (4*-264)
Δ = 169 - (-1056)
Δ = 1225 Δ > 0
-12x2-13x+22=0
x = -b ∓ √Δ 2a
x' = 13 - √1225 2*-12 = 13 - 35.0 -24 = -22.0 -24 = 0.916666666667
x" = 13 + √1225 2*-12 = 13 + 35.0 -24 = 48.0 -24 = -2.0
x' = 132.0
x" = -288.0
S = {x ∈ R / x' = 132.0, x" = -288.0 }