Question

Inequação
-x^2+6x-8>0

Answer 1

-x^2+6x-8>0
delta=b^2-4.a.c
delta=6^2-4.(-1).(-8)
delta=36-32
delta=4
x=-b-/+ raiz de delta/2a
x=-6-2/2.(-1)
x=-8/-2
x=4
x=-6+2/2.(-1)
x=-4/-2
x=2