-1x2 -17x -16 = 0
ax2 bx c = 0
a = -1
b = -17
c = -16
Δ = b2-4ac
Δ = -17² - (4 * -1 * -16)
Δ = 289 - (4*16)
Δ = 289 - (64)
Δ = 225 Δ > 0
-x2-17x-16=0
x = -b ∓ √Δ 2a
x' = 17 - √225 2*-1 = 17 - 15.0 -2 = 2.0 -2 = -1.0
x" = 17 + √225 2*-1 = 17 + 15.0 -2 = 32.0 -2 = -16.0
x' = -1.0
x" = -16.0
S = {x ∈ R / x' = -1.0, x" = -16.0 }