22x2 +5x -17 = 0
ax2 bx c = 0
a = 22
b = 5
c = -17
Δ = b2-4ac
Δ = 5² - (4 * 22 * -17)
Δ = 25 - (4*-374)
Δ = 25 - (-1496)
Δ = 1521 Δ > 0
22x2+5x-17=0
x = -b ∓ √Δ 2a
x' = -5 - √1521 2*22 = -5 - 39.0 44 = -44.0 44 = -1.0
x" = -5 + √1521 2*22 = -5 + 39.0 44 = 34.0 44 = 0.772727272727
x' = -484.0
x" = 374.0
S = {x ∈ R / x' = -484.0, x" = 374.0 }