22x2 +6x -16 = 0
ax2 bx c = 0
a = 22
b = 6
c = -16
Δ = b2-4ac
Δ = 6² - (4 * 22 * -16)
Δ = 36 - (4*-352)
Δ = 36 - (-1408)
Δ = 1444 Δ > 0
22x2+6x-16=0
x = -b ∓ √Δ 2a
x' = -6 - √1444 2*22 = -6 - 38.0 44 = -44.0 44 = -1.0
x" = -6 + √1444 2*22 = -6 + 38.0 44 = 32.0 44 = 0.727272727273
x' = -484.0
x" = 352.0
S = {x ∈ R / x' = -484.0, x" = 352.0 }