22x2 -20x -2 = 0
ax2 bx c = 0
a = 22
b = -20
c = -2
Δ = b2-4ac
Δ = -20² - (4 * 22 * -2)
Δ = 400 - (4*-44)
Δ = 400 - (-176)
Δ = 576 Δ > 0
22x2-20x-2=0
x = -b ∓ √Δ 2a
x' = 20 - √576 2*22 = 20 - 24.0 44 = -4.0 44 = -0.0909090909091
x" = 20 + √576 2*22 = 20 + 24.0 44 = 44.0 44 = 1.0
x' = -44.0
x" = 484.0
S = {x ∈ R / x' = -44.0, x" = 484.0 }