-4x2 +12x -9 = 0
ax2 bx c = 0
a = -4
b = 12
c = -9
Δ = b2-4ac
Δ = 12² - (4 * -4 * -9)
Δ = 144 - (4*36)
Δ = 144 - (144)
Δ = 0 Δ = 0
x = -b 2*a
x = -12 2*-4
x = 1.5
S = {x ∈ R / x = 1.5}
-4x2 +12x -9 = 0
ax2 bx c = 0
a = -4
b = 12
c = -9
Δ = b2-4ac
Δ = 12² - (4 * -4 * -9)
Δ = 144 - (4*36)
Δ = 144 - (144)
Δ = 0 Δ = 0
x = -b 2*a
x = -12 2*-4
x = 1.5
S = {x ∈ R / x = 1.5}