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 = -44.0 44 = -1.0
x" = -20 + √576 2*22 = -20 + 24.0 44 = 4.0 44 = 0.0909090909091
x' = -484.0
x" = 44.0
S = {x ∈ R / x' = -484.0, x" = 44.0 }