Question

x^2+5×-6=0 alguém sabe

Answer 1

Dani,

x² + 5x - 6 = 0

a = 1
b = 5
c = -6

Δ = b² - 4.a.c
Δ = 5² - 4.1.(-6)
Δ = 25 + 24
Δ = 49

Se Δ > 0, logo:

x = -b +- √Δ / 2.a
x = -5 +- √49 / 2.1
x = -5 +- 7 / 2

x' = -5+7/2 = 2/2 = 1
x'' = -5-7/2 = -12/2 = -6

S = {1, -6}