Question

encontre as raizes da equacao: -x2 - x + 30= 0

Answer 1

-x^2-x+30=0
Δ=b^2-4.a.c
Δ=(-1)^2-4.(-1).30
Δ=1+120
Δ=121
x1=1+11/2= 6
x2= 1-11/2= 5

Ou 

x=-b+-√b^2-4.a.c/2.a

Ou seja S={x∈R/x=6 5}