Question

Resolva com Δ= - b²-4ac e com x = – b ± √Δ
2·a

-x²+1=0

Answer 1

delta= 0^2 -4.(-1).1
delta=4

X’=(0+V4)/2.(-1)
X’=2/-2
X’=-1

X”=(0-V4)/2.(-1)
X”=-2/-2
X”=1

S={-1,1}