Question

encontre as raizes das seguintes equacoes
-x²+2x-1=0

Answer 1

-x² + 2x -1 = 0
a=-1
b=2
c=-1

Δ=b²-4ac
Δ=2²-4(-1)(-1)
Δ=4-4
Δ=0

x=-b+-√Δ/2a
x=-2+-√0/2(-1)
x=-2+-0/-2
x=-2/-2
x=1

S={1}