22x2 +3x -19 = 0
ax2 bx c = 0
a = 22
b = 3
c = -19
Δ = b2-4ac
Δ = 3² - (4 * 22 * -19)
Δ = 9 - (4*-418)
Δ = 9 - (-1672)
Δ = 1681 Δ > 0
22x2+3x-19=0
x = -b ∓ √Δ 2a
x' = -3 - √1681 2*22 = -3 - 41.0 44 = -44.0 44 = -1.0
x" = -3 + √1681 2*22 = -3 + 41.0 44 = 38.0 44 = 0.863636363636
x' = -484.0
x" = 418.0
S = {x ∈ R / x' = -484.0, x" = 418.0 }