22x2 -19x -3 = 0
ax2 bx c = 0
a = 22
b = -19
c = -3
Δ = b2-4ac
Δ = -19² - (4 * 22 * -3)
Δ = 361 - (4*-66)
Δ = 361 - (-264)
Δ = 625 Δ > 0
22x2-19x-3=0
x = -b ∓ √Δ 2a
x' = 19 - √625 2*22 = 19 - 25.0 44 = -6.0 44 = -0.136363636364
x" = 19 + √625 2*22 = 19 + 25.0 44 = 44.0 44 = 1.0
x' = -66.0
x" = 484.0
S = {x ∈ R / x' = -66.0, x" = 484.0 }