22x2 +19x +4 = 0
ax2 bx c = 0
a = 22
b = 19
c = 4
Δ = b2-4ac
Δ = 19² - (4 * 22 * 4)
Δ = 361 - (4*88)
Δ = 361 - (352)
Δ = 9 Δ > 0
22x2+19x+4=0
x = -b ∓ √Δ 2a
x' = -19 - √9 2*22 = -19 - 3.0 44 = -22.0 44 = -0.5
x" = -19 + √9 2*22 = -19 + 3.0 44 = -16.0 44 = -0.363636363636
x' = -242.0
x" = -176.0
S = {x ∈ R / x' = -242.0, x" = -176.0 }