22x2 +17x -5 = 0
ax2 bx c = 0
a = 22
b = 17
c = -5
Δ = b2-4ac
Δ = 17² - (4 * 22 * -5)
Δ = 289 - (4*-110)
Δ = 289 - (-440)
Δ = 729 Δ > 0
22x2+17x-5=0
x = -b ∓ √Δ 2a
x' = -17 - √729 2*22 = -17 - 27.0 44 = -44.0 44 = -1.0
x" = -17 + √729 2*22 = -17 + 27.0 44 = 10.0 44 = 0.227272727273
x' = -484.0
x" = 110.0
S = {x ∈ R / x' = -484.0, x" = 110.0 }