22x2 +13x -12 = 0
ax2 bx c = 0
a = 22
b = 13
c = -12
Δ = b2-4ac
Δ = 13² - (4 * 22 * -12)
Δ = 169 - (4*-264)
Δ = 169 - (-1056)
Δ = 1225 Δ > 0
22x2+13x-12=0
x = -b ∓ √Δ 2a
x' = -13 - √1225 2*22 = -13 - 35.0 44 = -48.0 44 = -1.09090909091
x" = -13 + √1225 2*22 = -13 + 35.0 44 = 22.0 44 = 0.5
x' = -528.0
x" = 242.0
S = {x ∈ R / x' = -528.0, x" = 242.0 }