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 = 16.0 44 = 0.363636363636
x" = 19 + √9 2*22 = 19 + 3.0 44 = 22.0 44 = 0.5
x' = 176.0
x" = 242.0
S = {x ∈ R / x' = 176.0, x" = 242.0 }