22x2 +13x +1 = 0
ax2 bx c = 0
a = 22
b = 13
c = 1
Δ = b2-4ac
Δ = 13² - (4 * 22 * 1)
Δ = 169 - (4*22)
Δ = 169 - (88)
Δ = 81 Δ > 0
22x2+13x+1=0
x = -b ∓ √Δ 2a
x' = -13 - √81 2*22 = -13 - 9.0 44 = -22.0 44 = -0.5
x" = -13 + √81 2*22 = -13 + 9.0 44 = -4.0 44 = -0.0909090909091
x' = -242.0
x" = -44.0
S = {x ∈ R / x' = -242.0, x" = -44.0 }