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 = -44.0 44 = -1.0
x" = -19 + √625 2*22 = -19 + 25.0 44 = 6.0 44 = 0.136363636364
x' = -484.0
x" = 66.0
S = {x ∈ R / x' = -484.0, x" = 66.0 }